Atomic number 86
Radon
Noble gas
Quick facts
- Atomic mass
- 222.00
- Group
- 18
- Period
- 6
- State (STP)
- gas
- Electronegativity
- —
- Common ox. states
- 0, +2
Properties
Electron configuration
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
- Ionization energy
- 1037.0 kJ/mol
- Electron affinity
- -68.0 kJ/mol
- Melting point
- 202.00 K (-71.1 °C)
- Boiling point
- 211.50 K (-61.6 °C)
How it bonds
Radon is the heaviest noble gas; can form a few fluorides (RnF₂) under harsh conditions but mostly behaves as a noble gas. The big deal: it's a radioactive decay product of uranium and thorium in soil, seeps into basements, and is the second-leading cause of lung cancer in the US.