| Element | Astatine | Symbol | At |
| Atomic Number | 85 | Molar Mass | 210 gmol-1 |
| Electron Configuration | [Xe]4f145d106s26p5 | Normal State | solid nonmetal |
| Density @STP | g cm-3 | Melting Point | 302oC |
| Boiling Point | 337oC | Stable Isotopes | none |
| Atomic Radius | pm | Ionic Radius | 227 (1-) pm |
| Electronegativity (Pauling) | 2 | Ionization Energy (1st) | 930 kJ mol-1 |
| Ionization Energy (2nd) | 1600 kJ mol-1 | Ionization Energy (3rd) | 2900 kJ mol-1 |
| Molar Heat Capacity | J K-1mol-1 | Standard Molar Entropy | J K-1mol-1 |
| Enthalpy of Fusion | 23.8 kJ mol-1 | Enthalpy of Vapourization | 100.8 kJ mol-1 |