27
Co
58.933
Cobalt
Element 27 · 58.933 u · d-block
transition metal
A hard, lustrous blue-grey metal. Used in lithium-ion batteries, superalloys, and the famous cobalt blue pigment.
Phase (STP)
Solid
Melting Point
1495 °C
Boiling Point
2927 °C
Density
8.86 g/cm³
Electronegativity
1.88
Atomic Radius
135 pm
Ionization Energy
760 kJ/mol
Electron Affinity
64 kJ/mol
Discovered
1735 · Georg Brandt
Electron Configuration
[Ar] 3d7 4s2
Electron Orbitals
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