| Symbol | At | Atomic radius: pm | - | Fusion: kJ/Mole | - |
| Name | Astatine | Ionic radius: pm | - | Boiling point: °C | - |
| Atomic number | 85 | Electron affinity | 2.8 | Melting point: °C | 302 |
| Atomic weight | 210.0 | 1st ion potential | - | Specific Heat Cap: J/(g K) | - |
| Classification | Metalloid | Natural form | - | Thermal Cond: W/(cm K) | 0.02 |
| Configuration | [Xe]4f145d106s2p5 | Crystal structure | - | Electrical Cond | - |
| Oxidation states | +/-1,3,5,7 | Density | - | Abundance: mg/kg-crust | <0.001 |
| Electronegativity | 2.2 | Vaporization: kJ/Mole | - | ||
| Astatine was first synthetically produced in 1940 at the University of California by Dale R. Corson, K.R. MacKenzie, and Emilio Segrč, who bombarded bismuth with accelerated alpha particles to yield astatine and neutrons. | Uses - no uses known | ||||