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Radium (88Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is 226Ra with a half-life of 1600 years, which is in the decay chain of 238U (the uranium or radium series).
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radium isotopes 226ra decay names 11 228ra half-life isotope physics ed crc given chain known mesothorium nucleus 223ra products center
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Isotopes of radium | 223Ra | trace | 1.00 | infobox |
| Isotopes of radium | 224Ra | trace | 1.00 | infobox |
| Isotopes of radium | 225Ra | trace | 1.00 | infobox |
| Isotopes of radium | 226Ra | trace | 1.00 | infobox |
| Isotopes of radium | 228Ra | trace | 1.00 | infobox |
| Isotopes of radium | Main isotopes | .mw-parser-output .isotopes-table{text-align:center;width:100%;border-collapse:collapse;margin:0;padding:0}.mw-parser-output .isotopes-table-headers>:not(:first-child){padding:0… | 1.00 | infobox |
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