Element | Hafnium | Symbol | Hf |
Atomic Number | 72 | Molar Mass | 178.49 gmol-1 |
Electron Configuration | [Xe]4f145d26s2 | Normal State | solid metal |
Density @STP | 13.28 g cm-3 | Melting Point | 2233oC |
Boiling Point | 4603oC | Stable Isotopes | 174Hf, 176Hf, 177Hf, 178Hf, 179Hf, 180Hf |
Atomic Radius | 159 pm | Ionic Radius | 84 (3+) pm |
Electronegativity (Pauling) | 1.3 | Ionization Energy (1st) | 642 kJ mol-1 |
Ionization Energy (2nd) | 1440 kJ mol-1 | Ionization Energy (3rd) | 2250 kJ mol-1 |
Molar Heat Capacity | 25.7 J K-1mol-1 | Standard Molar Entropy | 43.6 J K-1mol-1 |
Enthalpy of Fusion | 25.5 kJ mol-1 | Enthalpy of Vapourization | 661.1 kJ mol-1 |