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.
Experiment with the elements
Xenon doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.