Promethium
Electron Configuration: 2,8,18,23,8,2
Enthalpy of Fusion (kJ mol-1): 12.6
Enthalpy of Vaporisation (kJ mol-1): n/a
Atomic Radii
Atomic Radius 185 pm
Bohr Radius 205 pm
Covalent Radius 0 pm
Van der Waals 0 pm
Oxidation States
Main Pm+3
Other
Ionisation Energies (kJ mol-1) show graph
M - M+ 535.9
M+ - M2+ 1052
M2+ - M3+ 2150
M3+ - M4+ 3970