Number of Isotopes: 2
Electron Affinity (kJ/mol): 26.7
First Ionization Energy (kJ/mol): 800.6
Second Ionization Energy (kJ/mol): 2427
Third Ionization Energy (kJ/mol): 3659.7
Electronegativity: 2.04
Polarizability (Å3): 3
Atomic Volume (cm3/mol): 4.6
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 85
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 41
Common Oxidation Numbers: +3
Other Oxid. Numbers: +1, +2