Number of Isotopes: 2
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 538.1
Second Ionization Energy (kJ/mol): 1067
Third Ionization Energy (kJ/mol): 1850
Electronegativity: 1.1
Polarizability (Å3): 31.1
Atomic Volume (cm3/mol): 22.5
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 187
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 117.2
Common Oxidation Numbers: +3
Other Oxid. Numbers: +2