Number of Isotopes: 1
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 523.2
Second Ionization Energy (kJ/mol): 1018
Third Ionization Energy (kJ/mol): 2086
Electronegativity: 1.13
Polarizability (Å3): 28.2
Atomic Volume (cm3/mol): 21.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 182
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 113
Common Oxidation Numbers: +3
Other Oxid. Numbers: +2, +4