Atomic Properties
- Atomic Number
- 86
- Atomic Mass
- 222.0000 u
- Electron Configuration
- [Xe] 4f14 5d10 6s2 6p6
- Electronegativity
- 2.20
- Block
- p-block
- Group
- 18
- Period
- 6
Physical Properties
- Phase (STP)
- gas
- Melting Point
- 202.00 K
- Boiling Point
- 211.50 K
- Density
- 0.0097 g/cm³
About Radon
Radioactive noble gas; second leading cause of lung cancer after smoking.
Isotopes of Radon
Radon has 0 naturally occurring isotopes, plus 3 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 211Rn | 211 | 210.9906011 | — | Radioactive |
| 220Rn | 220 | 220.0113941 | — | Radioactive |
| 222Rn | 222 | 222.0175782 | — | Radioactive |
Data source: NIH PubChem (aggregated from IUPAC, NIST)