54 Xe 131.29
Xenon
Noble Gas
Xenon (Xe) is a chemical element with atomic number 54, classified as a noble gas. At room temperature it is a gas. It was discovered in 1898 by William Ramsay, Morris Travers.
Properties
- Atomic number
- 54
- Atomic mass
- 131.29 u
- Category
- Noble Gas
- Group
- 18
- Period
- 5
- Block
- p-block
- Electron configuration
- [Kr] 4d¹⁰ 5s² 5p⁶
- Phase at STP
- Gas
- Density
- 5.887 g/L
- Melting point
- 161.4 K (-111.7 °C)
- Boiling point
- 165.03 K (-108.1 °C)
- Electronegativity
- 2.6
- Atomic radius
- 108 pm
- Ionization energy
- 12.13 eV
- Discovery
- 1898 · William Ramsay, Morris Travers
Common uses
Lighting, anesthesia, ion propulsion, lasers
Did you know?
Used as anesthesia and can form compounds despite being noble gas.