Atomic Properties
- Atomic Number
- 36
- Atomic Mass
- 83.7980 u
- Electron Configuration
- [Ar] 3d10 4s2 4p6
- Electronegativity
- 3.00
- Block
- p-block
- Group
- 18
- Period
- 4
Physical Properties
- Phase (STP)
- gas
- Melting Point
- 115.78 K
- Boiling Point
- 119.93 K
- Density
- 0.0037 g/cm³
About Krypton
Noble gas; used in high-performance light bulbs and lasers.
Isotopes of Krypton
Krypton has 6 naturally occurring isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 78Kr | 78 | 77.92036494 | 0.3550% | Stable |
| 80Kr | 80 | 79.91637808 | 2.286% | Stable |
| 82Kr | 82 | 81.91348273 | 11.59% | Stable |
| 83Kr | 83 | 82.91412716 | 11.50% | Stable |
| 84Kr | 84 | 83.91149773 | 56.99% | Stable |
| 86Kr | 86 | 85.91061063 | 17.28% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)