54Gas
Xe 131.293 Atomic mass · uNoble gases
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.
Discovery 1898 (William Ramsay)
K2L8M18N18O8
Physical properties
Values for the element in its standard state.
- Density
- 0.0059g/cm³
- Melting point
- 161K
- Boiling point
- 165K
- Atomic radius
- 130pm
- Bonding type
- Atomic
- Molar heat
- Not available
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons;
[Kr] represents 36 core electrons. The full view shows them explicitly.
54 electrons Orbital order preserved from source
- Electronegativity
- 2.6Pauling scale
- First ionization energy
- 1,170kJ/mol
- Electron affinity
- 0kJ/mol
- Van der Waals radius
- 216pm
Xe XenonAtomic number 54
1,170kJ/mol
Atomic numberGaps indicate unavailable data
About xenon
- Appearance
- Colorless gas, exhibiting a blue glow when placed in a high voltage electric field
- Discovery
- 1898 (William Ramsay)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.