Number of Isotopes: 2
Electron Affinity (kJ/mol): 324.7
First Ionization Energy (kJ/mol): 1139.9
Second Ionization Energy (kJ/mol): 2103.4
Third Ionization Energy (kJ/mol): 3473.4
Electronegativity: 2.96
Polarizability (Å3): 3.1
Atomic Volume (cm3/mol): 25.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): 182
Atomic Radius (pm): 114
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: -1, +1, +3, +5
Other Oxid. Numbers: +4, +7