Actinium
Electron Configuration: 2,8,18,32,18,9,2
Enthalpy of Fusion (kJ mol-1): 14.2
Enthalpy of Vaporisation (kJ mol-1): 293
Atomic Radii
Atomic Radius 188 pm
Bohr Radius 0 pm
Covalent Radius 0 pm
Van der Waals 0 pm
Oxidation States
Main AcO, Ac+3
Other
Ionisation Energies (kJ mol-1) show graph
M - M+ 499
M+ - M2+ 1170
M2+ - M3+ 1900
M3+ - M4+ 4700
M4+ - M5+ 6000
M5+ - M6+ 7300
M6+ - M7+ 9200
M7+ - M8+ 10500
M8+ - M9+ 11900
M9+ - M10+ 15800