Atomic Number65Molar Mass158.92 g mol-1
Electron Configuration[Xe]4f96s2Normal Statesolid metal
Density @STP8.27 g cm-3Melting Point1356oC
Boiling Point3230oCStable Isotopes159Tb
Atomic Radius178 pmIonic Radius93 (3+) pm
Electronegativity (Pauling)Ionization Energy (1st)565 kJ mol-1
Ionization Energy (2nd)1112 kJ mol-1Ionization Energy (3rd)2114 kJ mol-1
Molar Heat Capacity28.9 J K-1mol-1Standard Molar Entropy73.2 J K-1mol-1
Enthalpy of Fusion16.3 kJ mol-1Enthalpy of Vapourization391 kJ mol-1
[Back to Periodic table] [ Home - www.gordonengland.co.uk]