Astatine (At)
A fascinating halogen element.
Astatine is element 85 on the periodic table.
Element properties
- Atomic number
- 85
- Symbol
- At
- Atomic mass
- 210 u
- Category
- Halogen
- Period
- 6
- Group
- 17
- Block
- p
- State
- Solid
- Electron configuration
- [Xe] 4f14 5d10 6s2 6p5
- Electronegativity (Pauling)
- 2.2
- Density
- Not available
- Melting point
- 302 °C
- Boiling point
- 337 °C