Number of Isotopes: 5
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 906.4
Second Ionization Energy (kJ/mol): 1733.2
Third Ionization Energy (kJ/mol): 3832.6
Electronegativity: 1.65
Polarizability (Å3): 6.4
Atomic Volume (cm3/mol): 9.2
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 134
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 88
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +2
Other Oxid. Numbers: