Astatine
Electron Configuration
|
General Properties
| Atomic Symbol | At |
| Atomic Weight | 210.00 g/mol |
| Element Number | 85 |
| Standard State | Solid |
| Standard Type | Strongly Basic |
| Date of Discovery | 1940 |
| Discoverer | Corson |
Physical Properties
| Oxidation States | +/-1, 3,5,7 |
| Boiling Point | 610* K |
| Melting Point | 575 K |
| Density | -- |
| Electron Configuration | [Xe]4f14,5d10,6s2,p5 |
| Acid/Base Properties | -- |
| Crystal Structure | -- |
| Electronegativity | 2.2 |
| Heat of Vaporization | 30* kJ/mol |
| Heat of Fusion | 12* kJ/mol |
| Electrical Conductivity | -- |
| Thermal Conductivity | 1.7 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | -- |
| First Ionization Potential | -- |
| Atomic Volume | -- |
| Atomic Radius | 1.45 Å |
| Covalent Radius | 1.47 Å |
| Synthetic | No |