| General |
|---|
| Name | Radon | | Symbol | Rn | | Number | 86 | | Chemical series | Noble gases | | Group / Period | 18 / 6 | | Block | p-block | | CAS registry number | 10043-92-2 |
| Physical properties |
|---|
| State | gas | | Density | 9.73 g/L | | Melting point | 202 K (−71.15 °C, −96 °F) | | Boiling point | 211.3 K (−61.85 °C, −79.1 °F) | | Critical point | 377 K, 6.28 MPa |
| Atomic properties |
|---|
| Atomic Weight | (222) g/mol | | Crystal structure | cubic face centered | | Electronegativity | 2.20 | | Atomic radius | | | Atomic radius (calculated) | 120 pm | | Electron configuration | [Xe] 4f14 5d10 6s2 6p6 | | Electrons per shell | 2, 8, 18, 32, 18, 8 | | Number of protons | 86 | | Number of neutrons | 136 |
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Francium