Polonium vs Astatine
Pick up to 3 elements and see how they stack up.
| Property | Polonium | Astatine |
|---|---|---|
| Atomic number | 84 | 85 |
| Atomic mass | 209 | 210 |
| Electronegativity | 2 | 2.2 |
| Melting point | 527 K (253.9 °C) | 575 K (301.8 °C) |
| Boiling point | 1,235 K (961.8 °C) | 610 K (336.8 °C) |
| Density | 9.196 g/cm³ | 7 g/cm³ |
| Atomic radius | 197 pm | 202 pm |
| Ionization energy | 8.417 eV | 9.5 eV |
| Discovered | 1898 | 1940 |
| Category | Post-transition metal | Halogen |
| State at room temp. | Solid | Solid |
| Block | p | p |
| Group | 16 | 17 |
| Period | 6 | 6 |
| Valence electrons | 6 | 7 |
| Common charges | +2, +4 | −1 |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p4 | [Xe] 4f14 5d10 6s2 6p5 |