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| Isotopes of Barium |
 Notes
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| There are twenty-two isotopes known, but most of these are highly radioactive and have half-llifes in the several millisecond to several minute range. |
 Notable Isotopes
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 130Ba [74 neutrons] |
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 Abundance: 0.106%
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| Stable with 74 neutrons
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| 132Ba [76 neutrons] |
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| Abundance: 0.101%
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| Stable with 76 neutrons
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| 133Ba [77 neutrons] |
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| Abundance: synthetic
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| Half life: 10.51 years [ Electron Capture ]
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| Decay Energy: 0.517MeV |
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| Decays to 133Cs.
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| 134Ba [78 neutrons] |
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| Abundance: 2.417%
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| Stable with 78 neutrons
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| 135Ba [79 neutrons] |
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| Abundance: 6.592%
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| Stable with 79 neutrons
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| 136Ba [80 neutrons] |
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| Abundance: 7.854%
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| Stable with 80 neutrons
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| 137Ba [81 neutrons] |
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| Abundance: 11.23%
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| Stable with 81 neutrons
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| 138Ba [82 neutrons] |
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| Abundance: 71.7%
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| Stable with 82 neutrons
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