Beryllium vs Radon
| Property | Be Beryllium | Rn Radon |
|---|---|---|
| Atomic number | 4 | 86 |
| Symbol | Be | Rn |
| Name | Beryllium | Radon |
| Category | alkaline-earth-metal | noble-gas |
| Standard Atomic Weight | 9.012183 u | 222 u |
| Period | 2 | 6 |
| Group | 2 | 18 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [He]2s2 | [Xe]6s24f145d106p6 |
| Oxidation states | [0, 1, 2] | [0, 2, 6] |
| Electronegativity (Pauling) | 1.57 | N/A |
| Electron affinity | -0.52 eV | -0.7 eV |
| Density | 1850 kg/m³ | 9.73 kg/m³ |
| Melting point | 1286.85 °C | -71.15 °C |
| Boiling point | 2470.85 °C | -61.7 °C |
| Discovery year | 1797 | 1900 |