Number of Isotopes: 5
Electron Affinity (kJ/mol): 41.1
First Ionization Energy (kJ/mol): 660
Second Ionization Energy (kJ/mol): 1266.8
Third Ionization Energy (kJ/mol): 2218.2
Electronegativity: 1.33
Polarizability (Å3): 17.9
Atomic Volume (cm3/mol): 14
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 160
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +4
Other Oxid. Numbers: +1, +2, +3