Co
Cobalt
27
Atomic Number: 27
Atomic mass: 58.9331955
Ionization energy: 760
Electronaffinity: -64
Covalent radius: 126
Calculated radius: 152
Empirical radius: 135
Vanderwaals radius:
Electronegativity: 1.88
Density: 8.9
Oxidation states: -1, 1, 2, 3, 4, 5
Melting point: 1768
Boiling point: 3200
Electron configuration: [Ar] 3d7 4s2
Element group: 9
Element period: 4

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