Number of Isotopes: 2
Electron Affinity (kJ/mol): 103
First Ionization Energy (kJ/mol): 833.7
Second Ionization Energy (kJ/mol): 1594.9
Third Ionization Energy (kJ/mol): 2441.1
Electronegativity: 2.05
Polarizability (Å3): 6.6
Atomic Volume (cm3/mol): 18.2
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 140
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 90
Common Oxidation Numbers: -3, +3, +5
Other Oxid. Numbers: