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86
Rn
[222]
Radon
Noble gases · Group 18 · Period 6
Atomic properties
| Atomic number | 86 |
|---|---|
| Symbol | Rn |
| Standard atomic weight | [222] |
| Classification | Noble gases |
| Group | 18 |
| Period | 6 |
| Block | p-block |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p6 |
| Electronegativity (Pauling) | 2.20 |
| Common oxidation states | 0, +2 |
Physical properties
| Phase at 20 °C | Gas |
|---|---|
| Density | 0.00973 g/cm³ |
| Melting point | -71 °C |
| Boiling point | -61.7 °C |
| Discovered | 1900 |
| CAS number | — |