Stable isotope Cobalt (Co)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Nuclear Spin
Co-59 27 32 58.93320 100.00% 7/2-

Properties of Cobalt

Name Cobalt
Symbol Co
Atomic number 27
Atomic weight 58.933
Standard state Solid at 298 °K
CAS Registry ID 7440-48-4
Group in periodic table 9
Group name None
Period in periodic table 4
Block in periodic table d-block
Color Lustrous, metallic, grayish tinge
Classification Metallic
Melting point 1495 °C
Boiling point 2870 °C
Thermal conductivity 100 W/(m·K) at 298.2 °K
Electrical resistivity 5.6 µΩ·cm at 20 °C
Electronegativity 1.8
Specific heat 421 J/kg K
Heat of vaporization 375 kJ·mol-1
Heat of fusion 16.2 kJ·mol-1
Density of solid 8.86 g/cm3
Electron configuration [Ar]3d74s2
Oxidation states 0, +1, +2, +3, +4, +5