A noble gas heavy enough to be an anaesthetic, and bright enough to flash a camera.
- Atomic number
- 54
- Atomic mass
- 131.293 u
- Phase
- Gas
- Electron configuration
- [Kr] 4d¹⁰ 5s² 5p⁶
- Melting point
- 161.4 K · -111.7 °C
- Boiling point
- 165.03 K · -108.1 °C
- Density
- 0.006 g/cm³
- Electronegativity
- 2.6
- Period / Group
- 5 / 18
- Discovery year
- 1898