Number of Isotopes: 2
Electron Affinity (kJ/mol): 30
First Ionization Energy (kJ/mol): 578.8
Second Ionization Energy (kJ/mol): 1978.9
Third Ionization Energy (kJ/mol): 2963
Electronegativity: 1.81
Polarizability (Å3): 8.1
Atomic Volume (cm3/mol): 11.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 135
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 76
Common Oxidation Numbers: +3
Other Oxid. Numbers: +1, +2