Krypton Kr
Element 36 — in the list.
Identity
- Atomic number
- 36
- Symbol
- Kr
- Most abundant neutron number
- 42
- Flow object
- fo-e0982f1a21c22537
- Elementary flows
- 1
- PubChem
- https://pubchem.ncbi.nlm.nih.gov/element/36
Nuclides and ions
5 nuclides, 0 ionsA nuclide and an ion of an element are flow objects in their own right — Kr and each of the records below are separate substances, resolved separately and characterised separately. What holds them together is a statement on the child naming this element as its parent, which is why they are drawn under it rather than beside it.
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Nuclides 5
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Half life 10.728 y ± 0.007. Decay β-=100%. chemlin
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Half life 4.480 h ± 0.008. Decay β-=78.8±0.5%; IT=21.2±0.5%. chemlin
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Half life 76.3 m ± 0.5. Decay β-=100%. chemlin
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Half life 2.825 h ± 0.019. Decay β-=100%. chemlin
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Half life 3.15 m ± 0.04. Decay β-=100%. chemlin
31 further nuclides are known and are not in this list: they are too short-lived for an inventory to carry, and their absence is a decision rather than a gap.
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Nuclide detail
| Nuclide | Mass number | Half life | Decay modes | Bq/g |
|---|---|---|---|---|
| Krypton-85 | 85 | 10.728 y ± 0.007 | β-=100% | 1.4517e+13 |
| Krypton-85m | 85 | 4.480 h ± 0.008 | β-=78.8±0.5%; IT=21.2±0.5% | 3.0462e+17 |
| Krypton-87 | 87 | 76.3 m ± 0.5 | β-=100% | 1.0491e+18 |
| Krypton-88 | 88 | 2.825 h ± 0.019 | β-=100% | 4.6687e+17 |
| Krypton-89 | 89 | 3.15 m ± 0.04 | β-=100% | 2.4839e+19 |