Number of Isotopes: 4
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 527.4
Second Ionization Energy (kJ/mol): 1047
Third Ionization Energy (kJ/mol): 1949
Electronegativity: 1.12
Polarizability (Å3): 29.6
Atomic Volume (cm3/mol): 20.7
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): 115
Common Oxidation Numbers: +3, +4
Other Oxid. Numbers: +2