Astatine vs Radon
Pick up to 3 elements and see how they stack up.
| Property | Astatine | Radon |
|---|---|---|
| Atomic number | 85 | 86 |
| Atomic mass | 210 | 222 |
| Electronegativity | 2.2 | 2.2 |
| Melting point | 575 K (301.8 °C) | 202 K (-71.1 °C) |
| Boiling point | 610 K (336.8 °C) | 211.3 K (-61.8 °C) |
| Density | 7 g/cm³ | 9.73 g/L |
| Atomic radius | 202 pm | 220 pm |
| Ionization energy | 9.5 eV | 10.745 eV |
| Discovered | 1940 | 1899 |
| Category | Halogen | Noble gas |
| State at room temp. | Solid | Gas |
| Block | p | p |
| Group | 17 | 18 |
| Period | 6 | 6 |
| Valence electrons | 7 | 8 |
| Common charges | −1 | 0 |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p5 | [Xe] 4f14 5d10 6s2 6p6 |