Symbol
Co
Atomic Number
27
Atomic Mass
58.933
Protons
27
Neutrons
32
Electrons
27
Type
Transition Metal
Isotopes
Cobalt-59
Discovery Year
1735
Discovered By
Georg Brandt
Group
9
Period
4
Boiling Point
5545°F
Melting Point
2695°F
Electron Configuration
[Ar] 3d⁷ 4s²
Density (g/cm³)
8.9
Crystal Structure
Hexagonal close-packed
Magnetism
Ferromagnetic
Abundance in Earth's Crust
0.0026%
Phase at Room Temperature
Solid