Xenon (Xe)
Xenon (Xe) is element 54 of the periodic table, a noble gas in period 5 and group 18. Its standard atomic weight is 131.293, so one mole of xenon atoms has a mass of 131.293 g. At room temperature it is a gas; it melts at -111.79 °C and boils at -108.12 °C.
| Atomic number | 54 |
|---|---|
| Symbol | Xe |
| Standard atomic weight | 131.293 |
| Molar mass | 131.293 g/mol |
| Category | Noble gas |
| Group | 18 |
| Period | 5 |
| Block | p-block |
| Electron configuration | [Kr] 5s2 4d10 5p6 |
| Oxidation states | 0 |
| Electronegativity (Pauling) | 2.6 |
| Atomic radius (van der Waals) | 216 pm |
| First ionisation energy | 12.13 eV (1170.4 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Gas |
| Melting point | 161.36 K (-111.79 °C) |
| Boiling point | 165.03 K (-108.12 °C) |
| Density | 5.887 g/L |
| Discovered | 1898 |
Group 18
Calculate with Xenon
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.