Number of Isotopes: 8
Electron Affinity (kJ/mol): 190.16
First Ionization Energy (kJ/mol): 869.2
Second Ionization Energy (kJ/mol): 1794.6
Third Ionization Energy (kJ/mol): 2697.7
Electronegativity: 2.1
Polarizability (Å3): 5.5
Atomic Volume (cm3/mol): 20.4
Ionic Radius2- (pm): 207
Ionic Radius1- (pm): No data
Atomic Radius (pm): 142
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: -2, +2, +4, +6
Other Oxid. Numbers: +5