Radium Ra
Element 88 — in the list.
Identity
- Atomic number
- 88
- Symbol
- Ra
- Most abundant neutron number
- 135
- Flow object
- fo-611748cc803ce39c
- Elementary flows
- 1
- PubChem
- https://pubchem.ncbi.nlm.nih.gov/element/88
Nuclides and ions
3 nuclides, 0 ionsA nuclide and an ion of an element are flow objects in their own right — Ra 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 3
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Half life 3.6316 d ± 0.0014. Decay α=100%; 14C=4.0e-9±1.2%. chemlin
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Half life 1.600 ky ± 0.007. Decay α=100%; 14C=2.6e-9±0.6%; 2β- ?. chemlin
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Half life 5.75 y ± 0.03. Decay β-=100%. chemlin
49 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 |
|---|---|---|---|---|
| Radium-224 | 224 | 3.6316 d ± 0.0014 | α=100%; 14C=4.0e-9±1.2% | 5.9385e+15 |
| Radium-226 | 226 | 1.600 ky ± 0.007 | α=100%; 14C=2.6e-9±0.6%; 2β- ? | 3.6601e+10 |
| Radium-228 | 228 | 5.75 y ± 0.03 | β-=100% | 1.0088e+13 |