Cobalt
Co
Cobalt
Transition Metal
Atomic number:
27
Atomic weight:
58.93320
Shells:
2,8,15,2
Orbitals:
[Ar] 3d7 4s2
Melting point:
1495°C
Boiling point:
2927°C
Covalent radius:
1.16
Å
Atomic volume:
6.7
cm³/mol
Atomic radius:
1.67
Å
Ionic radius:
.65 (+2)
Å
Electronegativity:
1.88
Oxidation states:
(2),3
1st ionization pot.:
7.8810
V
2nd ionization pot.:
17.06
V
3rd ionization pot.:
33.50
V
Specific heat:
0.42
J/gK
Heat of fusion:
16.190
kJ/mol
Heat of vapor.:
376.50
kJ/mol
Thermal conduct.:
1.00
W/cmK
Electrical conduct.:
0.172
10^6/cm ohm
Density:
8.90
g/cm³
Valence:
2,3
