54 Xe 131.294
Xenon
noble gas
Properties
- Atomic number
- 54
- Atomic mass
- 131.294 u
- Category
- noble gas
- Group
- 18
- Period
- 5
- Block
- p-block
- State (room temp)
- Gas
- Outer-shell electrons
- 8
- Electronegativity
- 2.6 (Pauling)
- Density
- —
- Melting point
- -111.75 °C
- Boiling point
- -108.1 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶
Noble-gas shorthand: [Kr] 4d¹⁰ 5s² 5p⁶
Electrons per shell: 2, 8, 18, 18, 8 — that's 8 in the outermost shell.
About Xenon
Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.
- Discovered by William Ramsay
- Appearance: colorless gas, exhibiting a blue glow when placed in a high voltage electric field
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.