A radioactive noble gas that seeps out of granite and is the second leading cause of lung cancer.
- Atomic number
- 86
- Atomic mass
- 222 u
- Phase
- Gas
- Electron configuration
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
- Melting point
- 202 K · -71.1 °C
- Boiling point
- 211.3 K · -61.8 °C
- Density
- 0.01 g/cm³
- Electronegativity
- 2.2
- Period / Group
- 6 / 18
- Discovery year
- 1900