Atomic Number27Molar Mass58.93 gmol-1
Electron Configuration[Ar]3d74s2Normal Statesolid metal
Density @STP8.8 g cm-3Melting Point1495oC
Boiling Point2927oCStable Isotopes59Co
Atomic Radius125 pmIonic Radius64 (3+) pm
Electronegativity (Pauling)1.88Ionization Energy (1st)760 kJ mol-1
Ionization Energy (2nd)1646 kJ mol-1Ionization Energy (3rd)3232 kJ mol-1
Molar Heat Capacity24.8 J K-1mol-1Standard Molar Entropy30 J K-1mol-1
Enthalpy of Fusion15.2 kJ mol-1Enthalpy of Vapourization382.4 kJ mol-1
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