Atomic Number96Molar Mass247.07 g mol-1
Electron Configuration[Rn]5f76d17s2Normal Statesolid metal
Density @STP13.3 g cm-3Melting Point1345oC
Boiling PointoCStable Isotopesnone
Atomic RadiusIonic Radius99 (3+) pm
Electronegativity (Pauling)1.3Ionization Energy (1st)581 kJ mol-1
Ionization Energy (2nd)1196 kJ mol-1Ionization Energy (3rd)2045 kJ mol-1
Molar Heat Capacity J K-1mol-1Standard Molar Entropy J K-1mol-1
Enthalpy of Fusion kJ mol-1Enthalpy of Vapourization kJ mol-1
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