Iron
Electron Configuration: 2,8,14,2
Enthalpy of Fusion (kJ mol-1): 14.9
Enthalpy of Vaporisation (kJ mol-1): 340.2
Atomic Radii
Atomic Radius 140 pm
Bohr Radius 156 pm
Covalent Radius 125 pm
Van der Waals 0 pm
Oxidation States
Main Fe+2, Fe+3
Other Fe-2, Fe-1, Fe0, Fe+1, Fe+4, Fe+5, Fe+6
Ionisation Energies (kJ mol-1) show graph
M - M+ 759.3
M+ - M2+ 1561
M2+ - M3+ 2957
M3+ - M4+ 5290
M4+ - M5+ 7240
M5+ - M6+ 9600
M6+ - M7+ 12100
M7+ - M8+ 14575
M8+ - M9+ 22678
M9+ - M10+ 25290