Chemical element
Xenon
- Xe
- Z = 54
- noble gas
Xenon (Xe) is element 54, a noble gas in period 5 and group 18. Its standard atomic weight is 131.29 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolXe
Standard atomic weight131.29atomic mass units (Da)
Mass in kilograms2.1801217 × 10^-25
Categorynoble gas
Group18
Period5
Blockp-block
Electrons in a neutral atom54
Neutrons in the most common isotope77≈
Quantities
Molar mass131.29 g/mol
Mass of one mole131.29 grams
Atoms in one gram4.5868998 × 10^21
Mass of one atom2.1801217 × 10^-22 g
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