10058-F4 A c-Myc inhibitor

10058-F4

A c-Myc inhibitor

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Metamizole (sodium salt) A nonspecific COX inhibitor

Metamizole (sodium salt)

A nonspecific COX inhibitor

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2-Methoxyamphetamine (hydrochloride) An Analytical Reference Standard

2-Methoxyamphetamine (hydrochloride)

An Analytical Reference Standard

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6-Thioguanine A thiopurine analog

6-Thioguanine

A thiopurine analog

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AB-FUBINACA isomer 5 An Analytical Reference Standard

AB-FUBINACA isomer 5

An Analytical Reference Standard

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Cefazolin (sodium salt) An inhibitor of bacterial cell wall synthesis

Cefazolin (sodium salt)

An inhibitor of bacterial cell wall synthesis

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FABP4 Inhibitor A cell-permeable, potent, and selective inhibitor of FABP4

FABP4 Inhibitor

A cell-permeable, potent, and selective inhibitor of FABP4

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SecinH3 A selective inhibitor of cytohesins

SecinH3

A selective inhibitor of cytohesins

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Tiotropium (bromide) A long-acting muscarinic receptor antagonist

Tiotropium (bromide)

A long-acting muscarinic receptor antagonist

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AdipoRon An adiponectin receptor agonist

AdipoRon

An adiponectin receptor agonist

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Periodic Table of the Elements

Interactive Periodic Table of the Elements

The interactive periodic table of the elements from Cayman allows scientists to quickly reference information about any of the known chemical elements. The element specific information provided includes: atomic mass, CAS number, period/group number, category, phase at standard temperature and pressure (0 °C and 1 atm), density at standard temperature and pressure, atomic radius, ionic radii, oxidation states, boiling point, melting point, valence, and discovery information.

Cayman Chemical Tools: Interactive Periodic Table of the Elements

1
H
1
1
Click for additional information on Hydrogen
1
H
Symbol: H
Atomic No: 1
Atomic Mass: 1.007947
Valence: 1
CAS No.: 1333-74-0
Hydrogen
Group No: 1
Period No: 1
Category: Nonmetal
Phase@ STP :  Gas
Density@ STP (g/mL): 0.00008988
Atomic Radius (pm): 38
Ionic Radii (pm): N/A
Oxidation States: -1, 0, +1
Boiling Point (K): 20.280005
Melting Point (K): 14.009985
Discovery: 1766, Cavendish
2
He
1
18
Click for additional information on Helium
2
He
Symbol: He
Atomic No: 2
Atomic Mass: 4.0026022
Valence: 0
CAS No.: 7440-59-7
Helium
Group No: 18
Period No: 1
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.0001785
Atomic Radius (pm): 32
Ionic Radii (pm): N/A
Oxidation States:  0
Boiling Point (K): 4.549994
Melting Point (K): 1.15
Discovery: 1895, Ramsay and Cleve
3
Li
2
1
Click for additional information on Lithium
3
Li
Symbol: Li
Atomic No: 3
Atomic Mass: 6.9412
Valence: 1
CAS No.: 7439-93-2
Lithium
Group No: 1
Period No: 2
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 0.534
Atomic Radius (pm): 152
Ionic Radii (pm): 76+1
Oxidation States: -1, 0, +1
Boiling Point (K): 1620.15
Melting Point (K): 453.69
Discovery: 1817, Arfvedson
4
Be
2
2
Click for additional information on Beryllium
4
Be
Symbol: Be
Atomic No: 4
Atomic Mass: 9.0121823
Valence: 2
CAS No.: 7440-41-7
Beryllium
Group No: 2
Period No: 2
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.85
Atomic Radius (pm): 112
Ionic Radii (pm): 45+2
Oxidation States:  0, +2
Boiling Point (K): 3243.15
Melting Point (K): 1551.15
Discovery: 1797, Vauquelin
5
B
2
13
Click for additional information on Boron
5
B
Symbol: B
Atomic No: 5
Atomic Mass: 10.8117
Valence: 3
CAS No.: 7440-42-8
Boron
Group No: 13
Period No: 2
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 2.34
Atomic Radius (pm): 82
Ionic Radii (pm): 27+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 2823.15
Melting Point (K): 2573.15
Discovery: 1808, Davy and Gay-Lussac
6
C
2
14
Click for additional information on Carbon
6
C
Symbol: C
Atomic No: 6
Atomic Mass: 12.01078
Valence: 4
CAS No.: 7440-44-0
Carbon
Group No: 14
Period No: 2
Category: Nonmetal
Phase@ STP :  Solid
Density@ STP (g/mL): 3.513
Atomic Radius (pm): 77
Ionic Radii (pm): 16+4
Oxidation States: -4,-3,-2,-1, 0, +1, +2, +3, +4
Boiling Point (K): 5100.15
Melting Point (K): 3773.15
Discovery: Prehistoric, Unknown
7
N
2
15
Click for additional information on Nitrogen
7
N
Symbol: N
Atomic No: 7
Atomic Mass: 14.00672
Valence: 3
CAS No.: 7727-37-9
Nitrogen
Group No: 15
Period No: 2
Category: Nonmetal
Phase@ STP :  Gas
Density@ STP (g/mL): 0.0012506
Atomic Radius (pm): 75
Ionic Radii (pm): 148-3, 16+3, 13+5
Oxidation States: -3,-2,-1, 0, +1, +2, +3, +4, +5
Boiling Point (K): 77.35
Melting Point (K): 63.250008
Discovery: 1772, Rutherford
8
O
2
16
Click for additional information on Oxygen
8
O
Symbol: O
Atomic No: 8
Atomic Mass: 15.99943
Valence: 2
CAS No.: 7782-44-7
Oxygen
Group No: 16
Period No: 2
Category: Nonmetal
Phase@ STP :  Gas
Density@ STP (g/mL): 0.001429
Atomic Radius (pm): 73
Ionic Radii (pm): 140-2
Oxidation States: -2,-1, 0, +1, +2
Boiling Point (K): 90.15
Melting Point (K): 54.750008
Discovery: 1774, Priestley and Scheele
9
F
2
17
Click for additional information on Fluorine
9
F
Symbol: F
Atomic No: 9
Atomic Mass: 18.99840325
Valence: 1
CAS No.: 7782-41-4
Fluorine
Group No: 17
Period No: 2
Category: Halogen
Phase@ STP :  Gas
Density@ STP (g/mL): 0.001696
Atomic Radius (pm): 71
Ionic Radii (pm): 133-1, 8+7
Oxidation States: -1, 0
Boiling Point (K): 85.01
Melting Point (K): 53.530006
Discovery: 1886, Moissan
10
Ne
2
18
Click for additional information on Neon
10
Ne
Symbol: Ne
Atomic No: 10
Atomic Mass: 20.17976
Valence: 0
CAS No.: 7440-01-9
Neon
Group No: 18
Period No: 2
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.0008999
Atomic Radius (pm): 69
Ionic Radii (pm): N/A
Oxidation States:  0
Boiling Point (K): 27.049994
Melting Point (K): 24.549994
Discovery: 1898, Ramsay and Travers
11
Na
3
1
Click for additional information on Sodium
11
Na
Symbol: Na
Atomic No: 11
Atomic Mass: 22.989769282
Valence: 1
CAS No.: 7440-23-5
Sodium
Group No: 1
Period No: 3
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 0.971
Atomic Radius (pm): 186
Ionic Radii (pm): 102+1
Oxidation States: -1, 0, +1
Boiling Point (K): 1156
Melting Point (K): 370.87
Discovery: 1807, Davy
12
Mg
3
2
Click for additional information on Magnesium
12
Mg
Symbol: Mg
Atomic No: 12
Atomic Mass: 24.30506
Valence: 2
CAS No.: 7439-95-4
Magnesium
Group No: 2
Period No: 3
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.738
Atomic Radius (pm): 160
Ionic Radii (pm): 72+2
Oxidation States:  0, +1, +2
Boiling Point (K): 1380.15
Melting Point (K): 923.15
Discovery: 1755, Black
13
Al
3
13
Click for additional information on Aluminum
13
Al
Symbol: Al
Atomic No: 13
Atomic Mass: 26.98153868
Valence: 3
CAS No.: 7429-90-5
Aluminum
Group No: 13
Period No: 3
Category: Other metal
Phase@ STP :  Solid
Density@ STP (g/mL): 2.698
Atomic Radius (pm): 143
Ionic Radii (pm): 53.5+3
Oxidation States:  0, +1, +3
Boiling Point (K): 2740.15
Melting Point (K): 933.52
Discovery: 1825, Oersted
14
Si
3
14
Click for additional information on Silicon
14
Si
Symbol: Si
Atomic No: 14
Atomic Mass: 28.08553
Valence: 4
CAS No.: 7440-21-3
Silicon
Group No: 14
Period No: 3
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 2.3296
Atomic Radius (pm): 111
Ionic Radii (pm): 40+4
Oxidation States: -4,-3,-2,-1, 0, +1, +2, +3, +4
Boiling Point (K): 2628.15
Melting Point (K): 1683.15
Discovery: 1824, Berzelius
15
P
3
15
Click for additional information on Phosphorus
15
P
Symbol: P
Atomic No: 15
Atomic Mass: 30.9737622
Valence: 5
CAS No.: 7723-14-0
Phosphorus
Group No: 15
Period No: 3
Category: Nonmetal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.82
Atomic Radius (pm): 106
Ionic Radii (pm): 44+3, 38+5
Oxidation States: -3,-2,-1, 0, +1, +2, +3, +4, +5
Boiling Point (K): 553.15
Melting Point (K): 317.25
Discovery: 1669, Brandt
16
S
3
16
Click for additional information on Sulfur
16
S
Symbol: S
Atomic No: 16
Atomic Mass: 32.0655
Valence: 6
CAS No.: 7704-34-9
Sulfur
Group No: 16
Period No: 3
Category: Nonmetal
Phase@ STP :  Solid
Density@ STP (g/mL): 2.067
Atomic Radius (pm): 102
Ionic Radii (pm): 184-2, 37+4, 29+6
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 717.75
Melting Point (K): 385.95
Discovery: Prehistoric, Unknown
17
Cl
3
17
Click for additional information on Chlorine
17
Cl
Symbol: Cl
Atomic No: 17
Atomic Mass: 35.4532
Valence: 5
CAS No.: 7782-50-5
Chlorine
Group No: 17
Period No: 3
Category: Halogen
Phase@ STP :  Gas
Density@ STP (g/mL): 0.003214
Atomic Radius (pm): 99
Ionic Radii (pm): 181-1, 12+5, 27+7
Oxidation States: -1, 0, +1, +2, +3, +4, +5, +6, +7
Boiling Point (K): 238.55
Melting Point (K): 172.17
Discovery: 1774, Scheele
18
Ar
3
18
Click for additional information on Argon
18
Ar
Symbol: Ar
Atomic No: 18
Atomic Mass: 39.9481
Valence: 0
CAS No.: 7440–37–1
Argon
Group No: 18
Period No: 3
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.0017837
Atomic Radius (pm): 97
Ionic Radii (pm): N/A
Oxidation States:  0
Boiling Point (K): 87.15
Melting Point (K): 83.85
Discovery: 1894, Ramsay and Rayleigh
19
K
4
1
Click for additional information on Potassium
19
K
Symbol: K
Atomic No: 19
Atomic Mass: 39.09831
Valence: 1
CAS No.: 7440-09-7
Potassium
Group No: 1
Period No: 4
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 0.862
Atomic Radius (pm): 227
Ionic Radii (pm): 138+1
Oxidation States:  0, +1
Boiling Point (K): 1047.15
Melting Point (K): 336.8
Discovery: 1807, Davy
20
Ca
4
2
Click for additional information on Calcium
20
Ca
Symbol: Ca
Atomic No: 20
Atomic Mass: 40.0784
Valence: 2
CAS No.: 7440-70-2
Calcium
Group No: 2
Period No: 4
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.54
Atomic Radius (pm): 197
Ionic Radii (pm): 100+2
Oxidation States:  0, +2
Boiling Point (K): 1757.15
Melting Point (K): 1112.15
Discovery: 1808, Davy
21
Sc
4
3
Click for additional information on Scandium
21
Sc
Symbol: Sc
Atomic No: 21
Atomic Mass: 44.9559126
Valence: 3
CAS No.: 7440-20-2
Scandium
Group No: 3
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 2.989
Atomic Radius (pm): 162
Ionic Radii (pm): 74.5+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 3105.15
Melting Point (K): 1812.15
Discovery: 1879, Nilson
22
Ti
4
4
Click for additional information on Titanium
22
Ti
Symbol: Ti
Atomic No: 22
Atomic Mass: 47.8671
Valence: 4
CAS No.: 7440-32-6
Titanium
Group No: 4
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 4.540
Atomic Radius (pm): 147
Ionic Radii (pm): 86+2, 67+3, 60.5+4
Oxidation States: -1, 0, +2, +3, +4
Boiling Point (K): 3560.15
Melting Point (K): 1933.15
Discovery: 1791, Gregor and Klaproth
23
V
4
5
Click for additional information on Vanadium
23
V
Symbol: V
Atomic No: 23
Atomic Mass: 50.94151
Valence: 5
CAS No.: 7440-62-2
Vanadium
Group No: 5
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 6.11
Atomic Radius (pm): 134
Ionic Radii (pm): 79+2, 64+3, 58+4, 54+5
Oxidation States: -1, 0, +1, +2, +3, +4, +5
Boiling Point (K): 3653.15
Melting Point (K): 2163.15
Discovery: 1801, del Rio
24
Cr
4
6
Click for additional information on Chromium
24
Cr
Symbol: Cr
Atomic No: 24
Atomic Mass: 51.99616
Valence: 6
CAS No.: 7440-47-3
Chromium
Group No: 6
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.15
Atomic Radius (pm): 128
Ionic Radii (pm): 73+2, 61.5+3, 55+4, 49+5, 44+6
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 2945.15
Melting Point (K): 2130.15
Discovery: 1797, Vauquelin
25
Mn
4
7
Click for additional information on Manganese
25
Mn
Symbol: Mn
Atomic No: 25
Atomic Mass: 54.9380455
Valence: 4
CAS No.: 7439-96-5
Manganese
Group No: 7
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.44
Atomic Radius (pm): 127
Ionic Radii (pm): 67+2, 58+3, 53+4, 33+5, 25.5+6, 46+7
Oxidation States: -3,-2,-1, 0, +1, +2, +3, +4, +5, +6, +7
Boiling Point (K): 2235.15
Melting Point (K): 1518.15
Discovery: 1774, Gahn
26
Fe
4
8
Click for additional information on Iron
26
Fe
Symbol: Fe
Atomic No: 26
Atomic Mass: 55.8452
Valence: 4
CAS No.: 7439-89-6
Iron
Group No: 8
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.874
Atomic Radius (pm): 126
Ionic Radii (pm): 61+2, 55+3, 58.5+4, 25+6
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 3023.15
Melting Point (K): 1808.15
Discovery: Prehistoric, Unknown
27
Co
4
9
Click for additional information on Cobalt
27
Co
Symbol: Co
Atomic No: 27
Atomic Mass: 58.9331955
Valence: 4
CAS No.: 7440-48-4
Cobalt
Group No: 9
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 8.86
Atomic Radius (pm): 125
Ionic Radii (pm): 65+2, 54.5+3, 53+4
Oxidation States: -1, 0, +1, +2, +3, +4, +5
Boiling Point (K): 3143.15
Melting Point (K): 1768.15
Discovery: 1735, Brandt
28
Ni
4
10
Click for additional information on Nickel
28
Ni
Symbol: Ni
Atomic No: 28
Atomic Mass: 58.69342
Valence: 4
CAS No.: 7440-02-0
Nickel
Group No: 10
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 8.912
Atomic Radius (pm): 124
Ionic Radii (pm): 69+2, 56+3, 48+4
Oxidation States: -1, 0, +1, +2, +3, +4
Boiling Point (K): 3005.15
Melting Point (K): 1726.15
Discovery: 1751, Cronstedt
29
Cu
4
11
Click for additional information on Copper
29
Cu
Symbol: Cu
Atomic No: 29
Atomic Mass: 63.5463
Valence: 2
CAS No.: 7440-50-8
Copper
Group No: 11
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 8.96
Atomic Radius (pm): 128
Ionic Radii (pm): 77+1, 73+2, 54+3
Oxidation States:  0, +1, +2, +3, +4
Boiling Point (K): 2840.15
Melting Point (K): 1356.15
Discovery: Prehistoric, Unknown
30
Zn
4
12
Click for additional information on Zinc
30
Zn
Symbol: Zn
Atomic No: 30
Atomic Mass: 65.4094
Valence: 2
CAS No.: 7440-66-6
Zinc
Group No: 12
Period No: 4
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.134
Atomic Radius (pm): 134
Ionic Radii (pm): 74+2
Oxidation States:  0, +2
Boiling Point (K): 1180.15
Melting Point (K): 692.73
Discovery: Prehistoric, Unknown
31
Ga
4
13
Click for additional information on Gallium
31
Ga
Symbol: Ga
Atomic No: 31
Atomic Mass: 69.7231
Valence: 3
CAS No.: 7440-55-3
Gallium
Group No: 13
Period No: 4
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 5.907
Atomic Radius (pm): 135
Ionic Radii (pm): 62+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 2676.15
Melting Point (K): 302.93
Discovery: 1875, Lecoq de Boiskaudran
32
Ge
4
14
Click for additional information on Germanium
32
Ge
Symbol: Ge
Atomic No: 32
Atomic Mass: 72.641
Valence: 4
CAS No.: 7440-56-4
Germanium
Group No: 14
Period No: 4
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 5.323
Atomic Radius (pm): 122
Ionic Radii (pm): 73+2, 53+4
Oxidation States: -4, 0, +1, +2, +3, +4
Boiling Point (K): 3103.15
Melting Point (K): 1210.55
Discovery: 1886, Winkler
33
As
4
15
Click for additional information on Arsenic
33
As
Symbol: As
Atomic No: 33
Atomic Mass: 74.921602
Valence: 5
CAS No.: 7440-38-2
Arsenic
Group No: 15
Period No: 4
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 5.776
Atomic Radius (pm): 119
Ionic Radii (pm): 58+3, 46+5
Oxidation States: -3, 0, +2, +3, +5
Boiling Point (K): 886.15
Melting Point (K): 1090.15
Discovery: ca. 1250, Albertus Magnus
34
Se
4
16
Click for additional information on Selenium
34
Se
Symbol: Se
Atomic No: 34
Atomic Mass: 78.963
Valence: 6
CAS No.: 7782-49-2
Selenium
Group No: 16
Period No: 4
Category: Nonmetal
Phase@ STP :  Solid
Density@ STP (g/mL): 4.809
Atomic Radius (pm): 116
Ionic Radii (pm): 198-2, 50+4, 42+6
Oxidation States: -2, 0, +2, +4, +6
Boiling Point (K): 958.05005
Melting Point (K): 490.15
Discovery: 1817, Berzelius
35
Br
4
17
Click for additional information on Bromine
35
Br
Symbol: Br
Atomic No: 35
Atomic Mass: 79.9041
Valence: 5
CAS No.: 7726-95-6
Bromine
Group No: 17
Period No: 4
Category: Halogen
Phase@ STP :  Liquid
Density@ STP (g/mL): 3.122
Atomic Radius (pm): 114
Ionic Radii (pm): 196-1, 59+3, 31+5, 39+7
Oxidation States: -1, 0, +1, +3, +4, +5, +7
Boiling Point (K): 331.93
Melting Point (K): 265.95
Discovery: 1826, Balard
36
Kr
4
18
Click for additional information on Krypton
36
Kr
Symbol: Kr
Atomic No: 36
Atomic Mass: 83.7982
Valence: 2
CAS No.: 7439-90-9
Krypton
Group No: 18
Period No: 4
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.003733
Atomic Radius (pm): 110
Ionic Radii (pm): N/A
Oxidation States:  0, +2
Boiling Point (K): 119.75001
Melting Point (K): 115.950005
Discovery: 1898, Ramsay and Travers
37
Rb
5
1
Click for additional information on Rubidium
37
Rb
Symbol: Rb
Atomic No: 37
Atomic Mass: 85.46783
Valence: 1
CAS No.: 7440-17-7
Rubidium
Group No: 1
Period No: 5
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.532
Atomic Radius (pm): 248
Ionic Radii (pm): 152+1
Oxidation States:  0, +1
Boiling Point (K): 961.15
Melting Point (K): 312.04
Discovery: 1861, Bunsen and Kirchhoff
38
Sr
5
2
Click for additional information on Strontium
38
Sr
Symbol: Sr
Atomic No: 38
Atomic Mass: 87.621
Valence: 2
CAS No.: 7440-24-6
Strontium
Group No: 2
Period No: 5
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 2.64
Atomic Radius (pm): 215
Ionic Radii (pm): 118+2
Oxidation States:  0, +2
Boiling Point (K): 1657.15
Melting Point (K): 1042.15
Discovery: 1790, Crawford
39
Y
5
3
Click for additional information on Yttrium
39
Y
Symbol: Y
Atomic No: 39
Atomic Mass: 88.905852
Valence: 3
CAS No.: 7440-65-5
Yttrium
Group No: 3
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 4.469
Atomic Radius (pm): 180
Ionic Radii (pm): 90+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 3610.15
Melting Point (K): 1796.15
Discovery: 1794, Gadolin
40
Zr
5
4
Click for additional information on Zirconium
40
Zr
Symbol: Zr
Atomic No: 40
Atomic Mass: 91.2242
Valence: 4
CAS No.: 7440-67-7
Zirconium
Group No: 4
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 6.506
Atomic Radius (pm): 160
Ionic Radii (pm): 72+4
Oxidation States:  0, +1, +2, +3, +4
Boiling Point (K): 4650.15
Melting Point (K): 2125.15
Discovery: 1789, Klaproth
41
Nb
5
5
Click for additional information on Niobium
41
Nb
Symbol: Nb
Atomic No: 41
Atomic Mass: 92.906382
Valence: 5
CAS No.: 7440-03-1
Niobium
Group No: 5
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 8.570
Atomic Radius (pm): 146
Ionic Radii (pm): 72+3, 68+4, 64+5
Oxidation States: -1, 0, +2, +3, +4, +5
Boiling Point (K): 5200.15
Melting Point (K): 2741.15
Discovery: 1801, Hatchet
42
Mo
5
6
Click for additional information on Molybdenum
42
Mo
Symbol: Mo
Atomic No: 42
Atomic Mass: 95.942
Valence: 6
CAS No.: 7439-98-7
Molybdenum
Group No: 6
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 10.22
Atomic Radius (pm): 139
Ionic Radii (pm): 69+3, 65+4, 61+5, 59+6
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 4885.15
Melting Point (K): 2890.15
Discovery: 1778, Scheele
43
Tc
5
7
Click for additional information on Technetium
43
Tc
Symbol: Tc
Atomic No: 43
Atomic Mass: 98.9063
Valence: 6
CAS No.: 7440-26-8
Technetium
Group No: 7
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 11.50
Atomic Radius (pm): 136
Ionic Radii (pm): 64.5+4, 60+5, 56+7
Oxidation States: -3,-1, 0, +1, +2, +3, +4, +5, +6, +7
Boiling Point (K): 5150.15
Melting Point (K): 2473.15
Discovery: 1937, Perrier and Segrè
44
Ru
5
8
Click for additional information on Ruthenium
44
Ru
Symbol: Ru
Atomic No: 44
Atomic Mass: 101.072
Valence: 6
CAS No.: 7440-18-8
Ruthenium
Group No: 8
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 12.37
Atomic Radius (pm): 134
Ionic Radii (pm): 68+3, 62+4, 56.5+5, 38+7, 36+8
Oxidation States: -2, 0, +1, +2, +3, +4, +5, +6, +7, +8
Boiling Point (K): 4173.15
Melting Point (K): 2523.15
Discovery: 1844, Claus
45
Rh
5
9
Click for additional information on Rhodium
45
Rh
Symbol: Rh
Atomic No: 45
Atomic Mass: 102.905502
Valence: 6
CAS No.: 7440-16-6
Rhodium
Group No: 9
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 12.41
Atomic Radius (pm): 134
Ionic Radii (pm): 66.5+3, 60+4, 55+5
Oxidation States: -1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 4000.15
Melting Point (K): 2239.15
Discovery: 1803, Wollaston
46
Pd
5
10
Click for additional information on Palladium
46
Pd
Symbol: Pd
Atomic No: 46
Atomic Mass: 106.421
Valence: 4
CAS No.: 7440-05-3
Palladium
Group No: 10
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 12.020
Atomic Radius (pm): 137
Ionic Radii (pm): 59+1, 86+2, 76+3, 61.5+4
Oxidation States:  0, +2, +4
Boiling Point (K): 3200.15
Melting Point (K): 1825.15
Discovery: 1803, Wollaston
47
Ag
5
11
Click for additional information on Silver
47
Ag
Symbol: Ag
Atomic No: 47
Atomic Mass: 107.86822
Valence: 3
CAS No.: 7440-22-4
Silver
Group No: 11
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 10.501
Atomic Radius (pm): 144
Ionic Radii (pm): 115+1, 94+2, 75+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 2485.15
Melting Point (K): 1235.08
Discovery: Prehistoric, Unknown
48
Cd
5
12
Click for additional information on Cadmium
48
Cd
Symbol: Cd
Atomic No: 48
Atomic Mass: 112.4118
Valence: 2
CAS No.: 7440-43-9
Cadmium
Group No: 12
Period No: 5
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 8.69
Atomic Radius (pm): 151
Ionic Radii (pm): 95+2
Oxidation States:  0, +2
Boiling Point (K): 1038.15
Melting Point (K): 594.05
Discovery: 1817, Stromeyer and Hermann
49
In
5
13
Click for additional information on Indium
49
In
Symbol: In
Atomic No: 49
Atomic Mass: 114.8183
Valence: 3
CAS No.: 7440-74-6
Indium
Group No: 13
Period No: 5
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.310
Atomic Radius (pm): 167
Ionic Radii (pm): 80+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 2273.15
Melting Point (K): 429.76
Discovery: 1863, Reich and Richter
50
Sn
5
14
Click for additional information on Tin
50
Sn
Symbol: Sn
Atomic No: 50
Atomic Mass: 118.7107
Valence: 4
CAS No.: 7440-31-5
Tin
Group No: 14
Period No: 5
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 7.287
Atomic Radius (pm): 141
Ionic Radii (pm): 112+2, 69+4
Oxidation States: -4, 0, +2, +4
Boiling Point (K): 2543.15
Melting Point (K): 505.05
Discovery: Prehistoric, Unknown
51
Sb
5
15
Click for additional information on Antimony
51
Sb
Symbol: Sb
Atomic No: 51
Atomic Mass: 121.7601
Valence: 5
CAS No.: 7440-36-0
Antimony
Group No: 15
Period No: 5
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 6.685
Atomic Radius (pm): 138
Ionic Radii (pm): 76+3, 60+5
Oxidation States: -3, 0, +3, +5
Boiling Point (K): 2023.15
Melting Point (K): 903.15
Discovery: Prehistoric, Unknown
52
Te
5
16
Click for additional information on Tellurium
52
Te
Symbol: Te
Atomic No: 52
Atomic Mass: 127.603
Valence: 6
CAS No.: 13494-80-9
Tellurium
Group No: 16
Period No: 5
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 6.232
Atomic Radius (pm): 135
Ionic Radii (pm): 221-2, 97+4, 56+6
Oxidation States: -2, 0, +2, +4, +5, +6
Boiling Point (K): 1262.95
Melting Point (K): 722.65
Discovery: 1782, von Reichenstein
53
I
5
17
Click for additional information on Iodine
53
I
Symbol: I
Atomic No: 53
Atomic Mass: 126.904473
Valence: 7
CAS No.: 7553-56-2
Iodine
Group No: 17
Period No: 5
Category: Halogen
Phase@ STP :  Solid
Density@ STP (g/mL): 4.93
Atomic Radius (pm): 133
Ionic Radii (pm): 220-1, 95+5, 53+7
Oxidation States: -1, 0, +1, +3, +5, +7
Boiling Point (K): 457.15
Melting Point (K): 386.65
Discovery: 1811, Courtois
54
Xe
5
18
Click for additional information on Xenon
54
Xe
Symbol: Xe
Atomic No: 54
Atomic Mass: 131.2936
Valence: 6
CAS No.: 7440-63-3
Xenon
Group No: 18
Period No: 5
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.005887
Atomic Radius (pm): 130
Ionic Radii (pm): 48+8
Oxidation States:  0, +2, +4, +6, +8
Boiling Point (K): 165.05
Melting Point (K): 161.25
Discovery: 1898, Ramsay and Travers
55
Cs
6
1
Click for additional information on Cesium
55
Cs
Symbol: Cs
Atomic No: 55
Atomic Mass: 132.90545192
Valence: 1
CAS No.: 7440-46-2
Cesium
Group No: 1
Period No: 6
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.873
Atomic Radius (pm): 265
Ionic Radii (pm): 167+1
Oxidation States:  0, +1
Boiling Point (K): 951.55005
Melting Point (K): 301.65
Discovery: 1860, Kirchhoff and Bunsen
56
Ba
6
2
Click for additional information on Barium
56
Ba
Symbol: Ba
Atomic No: 56
Atomic Mass: 137.3277
Valence: 2
CAS No.: 7440-39-3
Barium
Group No: 2
Period No: 6
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 3.594
Atomic Radius (pm): 222
Ionic Radii (pm): 135+2
Oxidation States:  0, +2
Boiling Point (K): 1413.15
Melting Point (K): 998.15
Discovery: 1808, Davy
57
La
6
Click for additional information on Lanthanum
57
La
Symbol: La
Atomic No: 57
Atomic Mass: 138.905477
Valence: 3
CAS No.: 7439-91-0
Lanthanum
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 6.145
Atomic Radius (pm): 187
Ionic Radii (pm): 103.2+3
Oxidation States:  0, +2, +3
Boiling Point (K): 3742.15
Melting Point (K): 1193.15
Discovery: 1839, Mosander
58
Ce
6
Click for additional information on Cerium
58
Ce
Symbol: Ce
Atomic No: 58
Atomic Mass: 140.1161
Valence: 4
CAS No.: 7440-45-1
Cerium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 6.770
Atomic Radius (pm): 181.8
Ionic Radii (pm): 102+3, 87+4
Oxidation States:  0, +2, +3, +4
Boiling Point (K): 3530.15
Melting Point (K): 1068.15
Discovery: 1803, von Hisinger and Berzelius
59
Pr
6
Click for additional information on Praseodymium
59
Pr
Symbol: Pr
Atomic No: 59
Atomic Mass: 140.90765 
Valence: 4
CAS No.: 7440-10-0
Praseodymium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 6.773
Atomic Radius (pm): 182.4
Ionic Radii (pm): 99+3, 85+4
Oxidation States:  0, +2, +3, +4
Boiling Point (K): 3400.15
Melting Point (K): 1208.15
Discovery: 1895, von Welsbach
60
Nd
6
Click for additional information on Neodymium
60
Nd
Symbol: Nd
Atomic No: 60
Atomic Mass: 144.2423
Valence: 3
CAS No.: 7440-00-8
Neodymium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 7.007
Atomic Radius (pm): 181.4
Ionic Radii (pm): 129+2, 98.3+3
Oxidation States:  0, +2, +3
Boiling Point (K): 3400.15
Melting Point (K): 1283.15
Discovery: 1895, von Welsbach
61
Pm
6
Click for additional information on Promethium
61
Pm
Symbol: Pm
Atomic No: 61
Atomic Mass: 146.9151
Valence: 3
CAS No.: 7440-12-2
Promethium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 7.26
Atomic Radius (pm): 183.4
Ionic Radii (pm): 97+3
Oxidation States:  0, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1945, Marinsky and Glendenin
62
Sm
6
Click for additional information on Samarium
62
Sm
Symbol: Sm
Atomic No: 62
Atomic Mass: 150.362
Valence: 3
CAS No.: 7440-19-9
Samarium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 7.52
Atomic Radius (pm): 180.4
Ionic Radii (pm): 122+2, 95.8+3
Oxidation States:  0, +2, +3
Boiling Point (K): 2173.15
Melting Point (K): 1345.15
Discovery: 1879, Lecoq de Boisbaudran
63
Eu
6
Click for additional information on Europium
63
Eu
Symbol: Eu
Atomic No: 63
Atomic Mass: 151.9641
Valence: 3
CAS No.: 7440-53-1
Europium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 5.243
Atomic Radius (pm): 180.4
Ionic Radii (pm): 117+2, 94.7+3
Oxidation States:  0, +2, +3
Boiling Point (K): 1870.15
Melting Point (K): 1095.15
Discovery: 1901, Demaçay
64
Gd
6
Click for additional information on Gadolinium
64
Gd
Symbol: Gd
Atomic No: 64
Atomic Mass: 157.253
Valence: 3
CAS No.: 7440-54-2
Gadolinium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 7.895
Atomic Radius (pm): 180.4
Ionic Radii (pm): 93.8+3
Oxidation States:  0, +1, +2, +3
Boiling Point (K): 3506.15
Melting Point (K): 1584.15
Discovery: 1880, de Marignac
65
Tb
6
Click for additional information on Terbium
65
Tb
Symbol: Tb
Atomic No: 65
Atomic Mass: 158.925352
Valence: 4
CAS No.: 7440-27-9
Terbium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 8.229
Atomic Radius (pm): 177.3
Ionic Radii (pm): 92.3+3, 76+4
Oxidation States:  0, +1, +3, +4
Boiling Point (K): 3314.15
Melting Point (K): 1633.15
Discovery: 1843, Mosander
66
Dy
6
Click for additional information on Dysprosium
66
Dy
Symbol: Dy
Atomic No: 66
Atomic Mass: 162.5001
Valence: 3
CAS No.: 7429-91-6
Dysprosium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 8.55
Atomic Radius (pm): 178.1
Ionic Radii (pm): 107+2, 91.2+3
Oxidation States:  0, +2, +3
Boiling Point (K): 2835.15
Melting Point (K): 1685.15
Discovery: 1886, Lecoq de Boisbaudran
67
Ho
6
Click for additional information on Holmium
67
Ho
Symbol: Ho
Atomic No: 67
Atomic Mass: 164.930322
Valence: 3
CAS No.: 7440-60-0
Holmium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 8.795
Atomic Radius (pm): 176.2
Ionic Radii (pm): 90.1+3
Oxidation States:  0, +3
Boiling Point (K): 2993.15
Melting Point (K): 1743.15
Discovery: 1878, Soret
68
Er
6
Click for additional information on Erbium
68
Er
Symbol: Er
Atomic No: 68
Atomic Mass: 167.2593
Valence: 3
CAS No.: 7440-52-0
Erbium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 9.066
Atomic Radius (pm): 176.1
Ionic Radii (pm): 89+3
Oxidation States:  0, +3
Boiling Point (K): 2783.15
Melting Point (K): 1795.15
Discovery: 1842, Mosander
69
Tm
6
Click for additional information on Thulium
69
Tm
Symbol: Tm
Atomic No: 69
Atomic Mass: 168.934212
Valence: 3
CAS No.: 7440-30-4
Thulium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 9.321
Atomic Radius (pm): 175.9
Ionic Radii (pm): 103+2, 88+3
Oxidation States:  0, +2, +3
Boiling Point (K): 2000.15
Melting Point (K): 1818.15
Discovery: 1879, Cleve
70
Yb
6
Click for additional information on Ytterbium
70
Yb
Symbol: Yb
Atomic No: 70
Atomic Mass: 173.043
Valence: 3
CAS No.: 7440-64-4
Ytterbium
Group No: 
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 6.965
Atomic Radius (pm): 176
Ionic Radii (pm): 102+2, 86.8+3
Oxidation States:  0, +2, +3
Boiling Point (K): 1739.15
Melting Point (K): 1097.15
Discovery: 1878, de Marignac
71
Lu
6
3
Click for additional information on Lutetium
71
Lu
Symbol: Lu
Atomic No: 71
Atomic Mass: 174.9671
Valence: 3
CAS No.: 7439-94-3
Lutetium
Group No: 3
Period No: 6
Category: Lanthanide
Phase@ STP :  Solid
Density@ STP (g/mL): 9.84
Atomic Radius (pm): 173.8
Ionic Radii (pm): 86.1+3
Oxidation States:  0, +3
Boiling Point (K): 3588.15
Melting Point (K): 1929.15
Discovery: 1907, Urbain
72
Hf
6
4
Click for additional information on Hafnium
72
Hf
Symbol: Hf
Atomic No: 72
Atomic Mass: 178.492
Valence: 4
CAS No.: 7440-58-6
Hafnium
Group No: 4
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 13.31
Atomic Radius (pm): 159
Ionic Radii (pm): 71+4
Oxidation States:  0, +2, +3, +4
Boiling Point (K): 5673.15
Melting Point (K): 2423.15
Discovery: 1923, Coster and vón Hevesy
73
Ta
6
5
Click for additional information on Tantalum
73
Ta
Symbol: Ta
Atomic No: 73
Atomic Mass: 180.94791
Valence: 5
CAS No.: 7440-25-7
Tantalum
Group No: 5
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 16.654
Atomic Radius (pm): 146
Ionic Radii (pm): 72+3, 68+4, 64+5
Oxidation States: -1, 0, +2, +3, +4, +5
Boiling Point (K): 5698.15
Melting Point (K): 3269.15
Discovery: 1802, Ekeberg
74
W
6
6
Click for additional information on Tungsten
74
W
Symbol: W
Atomic No: 74
Atomic Mass: 183.841
Valence: 6
CAS No.: 7440-33-7
Tungsten
Group No: 6
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 19.25
Atomic Radius (pm): 139
Ionic Radii (pm): 66+4, 62+5, 60+6
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 5933.15
Melting Point (K): 3683.15
Discovery: 1783, Gebrüder de Elhuyar
75
Re
6
7
Click for additional information on Rhenium
75
Re
Symbol: Re
Atomic No: 75
Atomic Mass: 186.2071
Valence: 7
CAS No.: 7440-15-5
Rhenium
Group No: 7
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 21.02
Atomic Radius (pm): 137
Ionic Radii (pm): 63+4, 58+5, 55+6, 53+7
Oxidation States: -3,-1, 0, +1, +2, +3, +4, +5, +6, +7
Boiling Point (K): 5900.15
Melting Point (K): 3453.15
Discovery: 1925, Noddack, Tacke and Berg
76
Os
6
8
Click for additional information on Osmium
76
Os
Symbol: Os
Atomic No: 76
Atomic Mass: 190.233
Valence: 6
CAS No.: 7440-04-2
Osmium
Group No: 8
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 22.610
Atomic Radius (pm): 135
Ionic Radii (pm): 63+4, 57.5+5, 54.5+6, 52.5+7, 39+8
Oxidation States: -2,-1, 0, +1, +2, +3, +4, +5, +6, +7, +8
Boiling Point (K): 5300.15
Melting Point (K): 3318.15
Discovery: 1803, Tenant
77
Ir
6
9
Click for additional information on Iridium
77
Ir
Symbol: Ir
Atomic No: 77
Atomic Mass: 192.2173
Valence: 6
CAS No.: 7439-88-5
Iridium
Group No: 9
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 22.560
Atomic Radius (pm): 135.5
Ionic Radii (pm): 68+3, 62.5+4, 57+5
Oxidation States: -3,-1, 0, +1, +2, +3, +4, +5, +6
Boiling Point (K): 4800.15
Melting Point (K): 2683.15
Discovery: 1803, Tenant and andere
78
Pt
6
10
Click for additional information on Platinum
78
Pt
Symbol: Pt
Atomic No: 78
Atomic Mass: 195.0849
Valence: 6
CAS No.: 7440-06-4
Platinum
Group No: 10
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 21.46
Atomic Radius (pm): 138.5
Ionic Radii (pm): 86+2, 62.5+4, 57+5
Oxidation States:  0, +2, +4, +5, +6
Boiling Point (K): 4100.15
Melting Point (K): 2045.15
Discovery: 1557, Scaliger
79
Au
6
11
Click for additional information on Gold
79
Au
Symbol: Au
Atomic No: 79
Atomic Mass: 196.9665694
Valence: 5
CAS No.: 7440-57-5
Gold
Group No: 11
Period No: 6
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 19.282
Atomic Radius (pm): 144
Ionic Radii (pm): 137+1, 85+3, 57+5
Oxidation States: -1, 0, +1, +2, +3, +5
Boiling Point (K): 3080.15
Melting Point (K): 1337.5801
Discovery: Prehistoric, Unknown
80
Hg
6
12
Click for additional information on Mercury
80
Hg
Symbol: Hg
Atomic No: 80
Atomic Mass: 200.592
Valence: 4
CAS No.: 7439-97-6
Mercury
Group No: 12
Period No: 6
Category: Transition metal
Phase@ STP :  Liquid
Density@ STP (g/mL): 13.5336
Atomic Radius (pm): 151
Ionic Radii (pm): 119+1, 102+2
Oxidation States:  0, +1, +2, +4
Boiling Point (K): 629.73
Melting Point (K): 234.28
Discovery: Prehistoric, Unknown
81
Tl
6
13
Click for additional information on Thallium
81
Tl
Symbol: Tl
Atomic No: 81
Atomic Mass: 204.38332
Valence: 3
CAS No.: 7440-28-0
Thallium
Group No: 13
Period No: 6
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 11.85
Atomic Radius (pm): 170
Ionic Radii (pm): 150+1, 88.5+3
Oxidation States:  0, +1, +3
Boiling Point (K): 1730.15
Melting Point (K): 576.65
Discovery: 1861, Crookes
82
Pb
6
14
Click for additional information on Lead
82
Pb
Symbol: Pb
Atomic No: 82
Atomic Mass: 207.21
Valence: 4
CAS No.: 7439-92-1
Lead
Group No: 14
Period No: 6
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 11.342
Atomic Radius (pm): 180
Ionic Radii (pm): 119+2, 77.5+4
Oxidation States: -4, 0, +2, +4
Boiling Point (K): 2013.15
Melting Point (K): 600.65
Discovery: Prehistoric, Unknown
83
Bi
6
15
Click for additional information on Bismuth
83
Bi
Symbol: Bi
Atomic No: 83
Atomic Mass: 208.980401
Valence: 5
CAS No.: 7440-69-9
Bismuth
Group No: 15
Period No: 6
Category: Post-Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 9.807
Atomic Radius (pm): 160
Ionic Radii (pm): 103+3, 76+5
Oxidation States: -3, 0, +3, +5
Boiling Point (K): 1833.15
Melting Point (K): 544.45
Discovery: 1540, Agricola
84
Po
6
16
Click for additional information on Polonium
84
Po
Symbol: Po
Atomic No: 84
Atomic Mass: 208.9824
Valence: 6
CAS No.: 7440-08-6
Polonium
Group No: 16
Period No: 6
Category: Metalloid
Phase@ STP :  Solid
Density@ STP (g/mL): 9.32
Atomic Radius (pm): 190
Ionic Radii (pm): 94+4, 67+6
Oxidation States: -2, 0, +2, +4, +6
Boiling Point (K): 1235.15
Melting Point (K): 527.15
Discovery: 1898, Marie and Pierre Curie
85
At
6
17
Click for additional information on Astatine
85
At
Symbol: At
Atomic No: 85
Atomic Mass: 209.9871
Valence: 7
CAS No.: 7440-68-8
Astatine
Group No: 17
Period No: 6
Category: Halogen
Phase@ STP :  Solid
Density@ STP (g/mL): 7
Atomic Radius (pm): 138
Ionic Radii (pm): 62+7
Oxidation States: -1, 0, +1, +3, +5, +7
Boiling Point (K): 610.15
Melting Point (K): 575.15
Discovery: 1940, Corson and MacKenzie
86
Rn
6
18
Click for additional information on Radon
86
Rn
Symbol: Rn
Atomic No: 86
Atomic Mass: 222.0176
Valence: 6
CAS No.: 10043-92-2
Radon
Group No: 18
Period No: 6
Category: Noble gas
Phase@ STP :  Gas
Density@ STP (g/mL): 0.00973
Atomic Radius (pm): 145
Ionic Radii (pm): N/A
Oxidation States:  0, +2
Boiling Point (K): 211.35
Melting Point (K): 202.15
Discovery: 1900, Dorn
87
Fr
7
1
Click for additional information on Francium
87
Fr
Symbol: Fr
Atomic No: 87
Atomic Mass: 223.0197
Valence: 1
CAS No.: 7440-73-5
Francium
Group No: 1
Period No: 7
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 1.87
Atomic Radius (pm): 348
Ionic Radii (pm): 180+1
Oxidation States:  0, +1
Boiling Point (K): 950.15
Melting Point (K): 300.15
Discovery: 1939, Perey
88
Ra
7
2
Click for additional information on Radium
88
Ra
Symbol: Ra
Atomic No: 88
Atomic Mass: 226.0254
Valence: 2
CAS No.: 7440-14-4
Radium
Group No: 2
Period No: 7
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 5.50
Atomic Radius (pm): 215
Ionic Radii (pm): 148+2
Oxidation States:  0, +2
Boiling Point (K): 2010.15
Melting Point (K): 973.15
Discovery: 1898, Marie and Pierre Curie
89
Ac
7
Click for additional information on Actinium
89
Ac
Symbol: Ac
Atomic No: 89
Atomic Mass: 227
Valence: 3
CAS No.: 7440-34-8
Actinium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 10.07
Atomic Radius (pm): 195
Ionic Radii (pm): 112+3
Oxidation States:  0, +3
Boiling Point (K): 3473.15
Melting Point (K): 1323.15
Discovery: 1899, Debierne
90
Th
7
Click for additional information on Thorium
90
Th
Symbol: Th
Atomic No: 90
Atomic Mass: 232.038062
Valence: 4
CAS No.: 7440-29-1
Thorium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 11.72
Atomic Radius (pm): 179
Ionic Radii (pm): 94+4
Oxidation States:  0, +2, +3, +4
Boiling Point (K): 5063.15
Melting Point (K): 2023.15
Discovery: 1829, Berzelius
91
Pa
7
Click for additional information on Protactinium
91
Pa
Symbol: Pa
Atomic No: 91
Atomic Mass: 231.035882
Valence: 5
CAS No.: 7440-13-3
Protactinium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 15.37
Atomic Radius (pm): 163
Ionic Radii (pm): 104+3, 90+4, 78+5
Oxidation States:  0, +3, +4, +5
Boiling Point (K): 0
Melting Point (K): 1873.15
Discovery: 1917, Soddy, Cranston and Hahn
92
U
7
Click for additional information on Uranium
92
U
Symbol: U
Atomic No: 92
Atomic Mass: 238.028913
Valence: 6
CAS No.: 7440-61-1
Uranium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 18.95
Atomic Radius (pm): 156
Ionic Radii (pm): 102.5+3, 89+4, 78+5, 73+6
Oxidation States:  0, +3, +4, +5, +6
Boiling Point (K): 4091.15
Melting Point (K): 1405.15
Discovery: 1789, Klaproth
93
Np
7
Click for additional information on Neptunium
93
Np
Symbol: Np
Atomic No: 93
Atomic Mass: 237.0482
Valence: 6
CAS No.: 7439-99-8
Neptunium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 20.45
Atomic Radius (pm): 155
Ionic Radii (pm): 110+2, 101+3, 87+4, 75+5, 72+6, 71+7
Oxidation States:  0, +3, +4, +5, +6, +7
Boiling Point (K): 4175.15
Melting Point (K): 913.15
Discovery: 1940, McMillan and Abelson
94
Pu
7
Click for additional information on Plutonium
94
Pu
Symbol: Pu
Atomic No: 94
Atomic Mass: 244.0642
Valence: 6
CAS No.: 7440-07-5
Plutonium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 19.84
Atomic Radius (pm): 159
Ionic Radii (pm): 100+3, 86+4, 74+5, 71+6
Oxidation States:  0, +3, +4, +5, +6, +7
Boiling Point (K): 3508.15
Melting Point (K): 912.65
Discovery: 1940, Seaborg
95
Am
7
Click for additional information on Americium
95
Am
Symbol: Am
Atomic No: 95
Atomic Mass: 243.0614
Valence: 4
CAS No.: 7440-35-9
Americium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 13.69
Atomic Radius (pm): 173
Ionic Radii (pm): 126+2, 97.5+3, 85+4
Oxidation States:  0, +2, +3, +4, +5, +6
Boiling Point (K): 2880.15
Melting Point (K): 1267.15
Discovery: 1944, Seaborg
96
Cm
7
Click for additional information on Curium
96
Cm
Symbol: Cm
Atomic No: 96
Atomic Mass: 247.0703
Valence: 4
CAS No.: 7440-51-9
Curium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 13.51
Atomic Radius (pm): 174
Ionic Radii (pm): 97+3, 85+4
Oxidation States:  0, +3, +4
Boiling Point (K): 0
Melting Point (K): 1613.15
Discovery: 1944, Seaborg
97
Bk
7
Click for additional information on Berkelium
97
Bk
Symbol: Bk
Atomic No: 97
Atomic Mass: 247.0703
Valence: 4
CAS No.: 7440-40-6
Berkelium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 14.79
Atomic Radius (pm): 170
Ionic Radii (pm): 96+3, 83+4
Oxidation States:  0, +3, +4
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1949, Seaborg
98
Cf
7
Click for additional information on Californium
98
Cf
Symbol: Cf
Atomic No: 98
Atomic Mass: 251.0796
Valence: 4
CAS No.: 7440-71-3
Californium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 15.10
Atomic Radius (pm): 186
Ionic Radii (pm): 95+3, 82.1+4
Oxidation States:  0, +2, +3, +4
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1950, Seaborg
99
Es
7
Click for additional information on Einsteinium
99
Es
Symbol: Es
Atomic No: 99
Atomic Mass: 252.0829
Valence: 4
CAS No.: 7429-92-7
Einsteinium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 13.5
Atomic Radius (pm): 186
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1952, Seaborg
100
Fm
7
Click for additional information on Fermium
100
Fm
Symbol: Fm
Atomic No: 100
Atomic Mass: 257.0951
Valence: 3
CAS No.: 7440-72-4
Fermium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1952, Seaborg
101
Md
7
Click for additional information on Mendelevium
101
Md
Symbol: Md
Atomic No: 101
Atomic Mass: 258.0986
Valence: 3
CAS No.: 7440-11-1
Mendelevium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1955, Seaborg
102
No
7
Click for additional information on Nobelium
102
No
Symbol: No
Atomic No: 102
Atomic Mass: 259.1009
Valence: 3
CAS No.: 10028-14-5
Nobelium
Group No: 
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1958, Seaborg
103
Lr
7
3
Click for additional information on Lawrencium
103
Lr
Symbol: Lr
Atomic No: 103
Atomic Mass: 260.1053
Valence: 3
CAS No.: 22537-19-5
Lawrencium
Group No: 3
Period No: 7
Category: Actinide
Phase@ STP :  Solid
Density@ STP (g/mL): 9.84
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1961, Ghiorso
104
Rf
7
4
Click for additional information on Rutherfordium
104
Rf
Symbol: Rf
Atomic No: 104
Atomic Mass: 261.10875
Valence: 4
CAS No.: 53850-36-5
Rutherfordium
Group No: 4
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 18.1
Atomic Radius (pm): 131
Ionic Radii (pm): N/A
Oxidation States:  0, +4
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1964/69, Flerow oder Ghiorso
105
Db
7
5
Click for additional information on Dubnium
105
Db
Symbol: Db
Atomic No: 105
Atomic Mass: 262.11415
Valence: 5
CAS No.: 53850-35-4
Dubnium
Group No: 5
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 39
Atomic Radius (pm): 126
Ionic Radii (pm): N/A
Oxidation States:  0, +5
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1967/70, Flerow oder Ghiorso
106
Sg
7
6
Click for additional information on Seaborgium
106
Sg
Symbol: Sg
Atomic No: 106
Atomic Mass: 266.12193
Valence: 6
CAS No.: 54038-81-2
Seaborgium
Group No: 6
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 35
Atomic Radius (pm): 121
Ionic Radii (pm): N/A
Oxidation States:  0, +6
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1974, Oganessian
107
Bh
7
7
Click for additional information on Bohrium
107
Bh
Symbol: Bh
Atomic No: 107
Atomic Mass: 264.12473
Valence: 7
CAS No.: 54037-14-8
Bohrium
Group No: 7
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 37
Atomic Radius (pm): 119
Ionic Radii (pm): N/A
Oxidation States:  0, +7
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1976, Oganessian
108
Hs
7
8
Click for additional information on Hassium
108
Hs
Symbol: Hs
Atomic No: 108
Atomic Mass: 269
Valence: 7
CAS No.: 54037-57-9
Hassium
Group No: 8
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 41
Atomic Radius (pm): 118
Ionic Radii (pm): N/A
Oxidation States:  0, +8
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1984, Society for Heavy Ion Research
109
Mt
7
9
Click for additional information on Meitnerium
109
Mt
Symbol: Mt
Atomic No: 109
Atomic Mass: 278
Valence: 7
CAS No.: 54038-01-6
Meitnerium
Group No: 9
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 35
Atomic Radius (pm): 113
Ionic Radii (pm): N/A
Oxidation States:  0, +3, +4, +6
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1982, Society for Heavy Ion Research
110
Ds
7
10
Click for additional information on Darmstadtium
110
Ds
Symbol: Ds
Atomic No: 110
Atomic Mass: 281
Valence: 7
CAS No.: 54083-77-1
Darmstadtium
Group No: 10
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 21.46
Atomic Radius (pm): 112
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +4, +6
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1994, Society for Heavy Ion Research
111
Rg
7
11
Click for additional information on Roentgenium
111
Rg
Symbol: Rg
Atomic No: 111
Atomic Mass: 281
Valence: 7
CAS No.: 54386-24-2
Roentgenium
Group No: 11
Period No: 7
Category: Transition metal
Phase@ STP :  Solid
Density@ STP (g/mL): 19.282
Atomic Radius (pm): 118
Ionic Radii (pm): N/A
Oxidation States:  0, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1994, Society for Heavy Ion Research
112
Cn
7
12
Click for additional information on Copernicium
112
Cn
Symbol: Cn
Atomic No: 112
Atomic Mass: 285
Valence: 6
CAS No.: 54084-26-3
Copernicium
Group No: 12
Period No: 7
Category: Transition metal
Phase@ STP :  Liquid
Density@ STP (g/mL): 13.5336
Atomic Radius (pm): 130
Ionic Radii (pm): N/A
Oxidation States:  0, +2
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1996, Sigurd Hofmann, Victor Ninov
113
Uut
7
13
Click for additional information on Ununtrium
113
Uut
Symbol: Uut
Atomic No: 113
Atomic Mass: 286
Valence: 5
CAS No.: 54084-70-7
Ununtrium
Group No: 13
Period No: 7
Category: Unknown
Phase@ STP :  Solid
Density@ STP (g/mL): 11.85
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +1
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 2005, Dubna-Livermore collaboration
114
Uuq
7
14
Click for additional information on Ununquadium
114
Uuq
Symbol: Uuq
Atomic No: 114
Atomic Mass: 289
Valence: 4
CAS No.: 54085-16-4
Ununquadium
Group No: 14
Period No: 7
Category: Unknown
Phase@ STP :  Gas
Density@ STP (g/mL): 11.342
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +4
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 1998, Dubna (FLNR) Scientists
115
Uup
7
15
Click for additional information on Ununpentium
115
Uup
Symbol: Uup
Atomic No: 115
Atomic Mass: 289
Valence: 0
CAS No.: 54085-64-2
Ununpentium
Group No: 15
Period No: 7
Category: Unknown
Phase@ STP :  Solid
Density@ STP (g/mL): 9.807
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +1, +3
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 2004, Dubna (JINR) Scientists
116
Uuh
7
16
Click for additional information on Ununhexium
116
Uuh
Symbol: Uuh
Atomic No: 116
Atomic Mass: 293
Valence: 0
CAS No.: 54100-71-9
Ununhexium
Group No: 16
Period No: 7
Category: Unknown
Phase@ STP :  Solid
Density@ STP (g/mL): 9.32
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +4
Boiling Point (K): 0
Melting Point (K): 0
Discovery: 2000, Dubna (FLNR) Scientists
117
Uus
7
17
Click for additional information on Ununseptium
117
Uus
Symbol: Uus
Atomic No: 117
Atomic Mass: 294
Valence: 0
CAS No.: 87658-56-8
Ununseptium
Group No: 17
Period No: 7
Category: Unknown
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0
Boiling Point (K): 0
Melting Point (K): 0
Discovery: Undiscovered
118
Uuo
7
18
Click for additional information on Ununoctium
118
Uuo
Symbol: Uuo
Atomic No: 118
Atomic Mass: 294
Valence: 0
CAS No.: 54144-19-3
Ununoctium
Group No: 18
Period No: 7
Category: Unknown
Phase@ STP :  Gas
Density@ STP (g/mL): 13.65
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2, +4
Boiling Point (K): 380
Melting Point (K): 0
Discovery: 2002, Dubna (JINR) Scientists
119
Uue
8
1
Click for additional information on Ununennium
119
Uue
Symbol: Uue
Atomic No: 119
Atomic Mass: 0
Valence: 0
CAS No.: N/A
Ununennium
Group No: 1
Period No: 8
Category: Alkali metal
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +1
Boiling Point (K): 0
Melting Point (K): 0
Discovery: Undiscovered
120
Ubn
8
2
Click for additional information on Unbinilium
120
Ubn
Symbol: Ubn
Atomic No: 120
Atomic Mass: 0
Valence: 0
CAS No.: N/A
Unbinilium
Group No: 2
Period No: 8
Category: Alkaline earth metal
Phase@ STP :  Solid
Density@ STP (g/mL): 0
Atomic Radius (pm): 0
Ionic Radii (pm): N/A
Oxidation States:  0, +2
Boiling Point (K): 0
Melting Point (K): 0
Discovery: Undiscovered
-1
D
Click for additional information on Deuterium
-1
D
Symbol: D
Atomic No: -1
Atomic Mass: 2.0136
Valence: 0
CAS No.:
Deuterium
Group No: 
Period No: 
Category: Nonmetal
Phase@ STP :  
Density@ STP (g/mL):
Atomic Radius (pm):
Ionic Radii (pm):
Oxidation States:
Boiling Point (K):
Melting Point (K):
Discovery: ,

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