| Astatine | |
| Electrons per shell | 2,8,18,32,18,7 |
| Electron Configuration | [Xe] 4f14 5d10 6s2 6p5 ![]() |
| Ground state | 2P°3/2 |
| Atomic Volume | cm3 mol-1 |
| Electronegativity | 2.2 |
| Magnetic ordering | No data |
Thermal Properties |
|
| Enthalpy of Atomization | 92 kJ mol-1 @25°C |
| Enthalpy of Fusion | 23.8 kJ mol-1 |
| Enthalpy of Vaporisation | No data. |
| Heat Capacity | No data. |
| Thermal Conductivity | 1.7 W m-1 K-1 |
| Thermal Expansion | No data. |
| Critcal Temperature | No data. |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Electrical Properties |
|
| Electrical resistivity | No data. |
| Electrical conductivity | ? 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 7.8346 g Ah-1 |
| Ionization Potential | |
| 9.65 | |
Energy Levels |
|
| 81.52 KeV | |
| 78.95 KeV | |
| 92.3 KeV | |
| 11.4268 KeV | |
| 11.3048 KeV | |
| 13.876 KeV | |
| 14.0678 KeV | |
| 13.4839 KeV | |
| 16.251 KeV | |
| 16.5769 KeV | |
| 12.47 KeV | |
| 9.8964 KeV | |
Atomic Radii |
|
| No data. | |
| No data. | |
| No data. | |
| No data. | |
| 138 pm | |
| No data. | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 7 | VI | 0.76 | 0.62 | A |
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
Oxidation States |
|
| At-1, At+1, At+3 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 930 | |
| 1600 | |
| 2900 | |
| 4000 | |
| 4900 | |
| 7500 | |
| 8800 | |
| 13300 | |
| 15400 | |
| 17700 | |
Covalent Bonds (kJ mol-1) |
|
| 110 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 361 | 392 | 429 | 475 | 531 | 607 |