Number of Isotopes: 1
Electron Affinity (kJ/mol): 78
First Ionization Energy (kJ/mol): 946.5
Second Ionization Energy (kJ/mol): 1797.8
Third Ionization Energy (kJ/mol): 2735.4
Electronegativity: 2.18
Polarizability (Å3): 4.3
Atomic Volume (cm3/mol): 13
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 120
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 72
Common Oxidation Numbers: -3, +3, +5
Other Oxid. Numbers: +2