Atomic Properties
- Atomic Number
- 54
- Atomic Mass
- 131.2900 u
- Electron Configuration
- [Kr] 4d10 5s2 5p6
- Electronegativity
- 2.60
- Block
- p-block
- Group
- 18
- Period
- 5
Physical Properties
- Phase (STP)
- gas
- Melting Point
- 161.40 K
- Boiling Point
- 165.05 K
- Density
- 0.0059 g/cm³
About Xenon
Noble gas that can form compounds; used in flash lamps and anesthesia.
Isotopes of Xenon
Xenon has 9 naturally occurring isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 124Xe | 124 | 123.905892 | 0.0952% | Stable |
| 126Xe | 126 | 125.9042983 | 0.0890% | Stable |
| 128Xe | 128 | 127.903531 | 1.910% | Stable |
| 129Xe | 129 | 128.9047809 | 26.40% | Stable |
| 130Xe | 130 | 129.9035093 | 4.071% | Stable |
| 131Xe | 131 | 130.9050841 | 21.23% | Stable |
| 132Xe | 132 | 131.9041551 | 26.91% | Stable |
| 134Xe | 134 | 133.9053947 | 10.44% | Stable |
| 136Xe | 136 | 135.9072145 | 8.857% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)