Hafnium vs Radon
| Property | Hf Hafnium | Rn Radon |
|---|---|---|
| Atomic number | 72 | 86 |
| Symbol | Hf | Rn |
| Name | Hafnium | Radon |
| Category | transition-metal | noble-gas |
| Standard Atomic Weight | 178.49 u | 222 u |
| Period | 6 | 6 |
| Group | 4 | 18 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [Xe]6s24f145d2 | [Xe]6s24f145d106p6 |
| Oxidation states | [-2, 0, 1, 2, 3, 4] | [0, 2, 6] |
| Electronegativity (Pauling) | 1.3 | N/A |
| Electron affinity | 0.178 eV | -0.7 eV |
| Density | 1.330000e+4 kg/m³ | 9.73 kg/m³ |
| Melting point | 2232.85 °C | -71.15 °C |
| Boiling point | 4602.85 °C | -61.7 °C |
| Discovery year | 1911 | 1900 |