M = Metal / O = Oxide / E = Element / G = Gas / C = Carbonate / CI = Chloride
Barium
| Isotopes | Chemical form | Natural abundance % |
| 130Ba | C,O | 0.101 |
| 132Ba | C,O | 0.97 |
| 134Ba | C,O | 2.42 |
| 135Ba | C,O | 6.59 |
| 136Ba | C,O | 7.85 |
| 137Ba | C,O | 11.23 |
| 138Ba | C,O | 71.70 |
| Isotopes | Chemical form | Natural abundance % |
| 130Ba | C,O | 0.101 |
| 132Ba | C,O | 0.97 |
| 134Ba | C,O | 2.42 |
| 135Ba | C,O | 6.59 |
| 136Ba | C,O | 7.85 |
| 137Ba | C,O | 11.23 |
| 138Ba | C,O | 71.70 |
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