Element | Radium | Symbol | Ra |
Atomic Number | 88 | Molar Mass | 226.03 gmol-1 |
Electron Configuration | [Rn]7s2 | Normal State | solid metal |
Density @STP | 5 g cm-3 | Melting Point | 700oC |
Boiling Point | 1140oC | Stable Isotopes | none |
Atomic Radius | 223 pm | Ionic Radius | 152 (2+) pm |
Electronegativity (Pauling) | 0.89 | Ionization Energy (1st) | 509 kJ mol-1 |
Ionization Energy (2nd) | 979 kJ mol-1 | Ionization Energy (3rd) | 3300 kJ mol-1 |
Molar Heat Capacity | 20.8 J K-1mol-1 | Standard Molar Entropy | 71 J K-1mol-1 |
Enthalpy of Fusion | 7.15 kJ mol-1 | Enthalpy of Vapourization | 136.8 kJ mol-1 |