Number of Isotopes: 1
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 717.4
Second Ionization Energy (kJ/mol): 1509
Third Ionization Energy (kJ/mol): 3248.3
Electronegativity: 1.55
Polarizability (Å3): 9.4
Atomic Volume (cm3/mol): 7.4
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 127
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 89
Ionic Radius3+ (pm): 75.3
Common Oxidation Numbers: +2, +4, +7
Other Oxid. Numbers: -3, -2, -1, +1, +3, +5, +6