Atomic Number87Molar Mass223 gmol-1
Electron Configuration[Rn]7s1Normal Statesolid metal
Density @STP1 g cm-3Melting Point27oC
Boiling Point677oCStable Isotopesnone
Atomic Radius270 pmIonic Radius180 (1+) pm
Electronegativity (Pauling)0.7Ionization Energy (1st)380 kJ mol-1
Ionization Energy (2nd)2100 kJ mol-1Ionization Energy (3rd)3100 kJ mol-1
Molar Heat CapacityJ K-1mol-1Standard Molar EntropyJ K-1mol-1
Enthalpy of FusionkJ mol-1Enthalpy of VapourizationkJ mol-1
[Back to Periodic table] [ Home -]