Atomic Properties
- Atomic Number
- 85
- Atomic Mass
- 210.0000 u
- Electron Configuration
- [Xe] 4f14 5d10 6s2 6p5
- Electronegativity
- 2.20
- Block
- p-block
- Group
- 17
- Period
- 6
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 575.00 K
- Boiling Point
- 610.00 K
- Density
- 7.0000 g/cm³
About Astatine
Rarest naturally occurring element; all isotopes radioactive.
Isotopes of Astatine
Astatine has 0 naturally occurring isotopes, plus 2 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 210At | 210 | 209.9871479 | — | Radioactive |
| 211At | 211 | 210.9874966 | — | Radioactive |
Data source: NIH PubChem (aggregated from IUPAC, NIST)