| Atomic Number | 85 |
| Molar Mass | 210 |
| State at Room Temperature | ? |
| Melting Temperature/°C | 302 |
| Boiling Temperature/°C | 337 |
| Atomic Radius/pm | ? |
| Ionic Radius | ? |
| 1st Ionization energy/ kJ mol | ? |
| Electron Affinity/ kJ mol | ? |
| Bond Dissociation Enthalpy/ kJ mol | ? |
Astatine is both rare and radioactive, so its chemistry has been little studied.