| name | Astatine |
| latin | Astatium |
| french | Astate |
| german | Astat |
| symbol | At |
| proton number | 85 |
| atomic weight | [210] |
| Pauling electronegativity | 2.2 |
| electronic configuration | [Xe] 4f145d106s26p5 1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p5 |
| melting point | 575 K, 302°C, 575°F |
| boiling point | - |
| group | 17 |
| period | 6 |
| state (by 20°C) | solid |
| oxidation states | -1, +1, +3, +5, +7 |
| Year of discovery | Discoverers |
| 1940 | Dale R. Corson K. R. Meckenzie Emilio G. Segre (1905-1989) |