Number of Isotopes: 6
Electron Affinity (kJ/mol): 0
First Ionization Energy (kJ/mol): 680
Second Ionization Energy (kJ/mol): 1440
Third Ionization Energy (kJ/mol): 2250
Electronegativity: 1.3
Polarizability (Å3): 16.2
Atomic Volume (cm3/mol): 13.4
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 159
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +4
Other Oxid. Numbers: +2, +3