Barium vs Radon
| Property | Ba Barium | Rn Radon |
|---|---|---|
| Atomic number | 56 | 86 |
| Symbol | Ba | Rn |
| Name | Barium | Radon |
| Category | alkaline-earth-metal | noble-gas |
| Standard Atomic Weight | 137.327 u | 222 u |
| Period | 6 | 6 |
| Group | 2 | 18 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [Xe]6s2 | [Xe]6s24f145d106p6 |
| Oxidation states | [1, 2] | [0, 2, 6] |
| Electronegativity (Pauling) | 0.89 | N/A |
| Electron affinity | 0.1447 eV | -0.7 eV |
| Density | 3620 kg/m³ | 9.73 kg/m³ |
| Melting point | 726.85 °C | -71.15 °C |
| Boiling point | 1896.85 °C | -61.7 °C |
| Discovery year | 1808 | 1900 |