| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 56 | Ba | 130 | 129.906 3207(28) | 0.001 06(1) | 137.327(7) | |||
| 132 | 131.905 0611(11) | 0.001 01(1) | ||||||
| 134 | 133.904 508 18(30) | 0.024 17(18) | ||||||
| 135 | 134.905 688 38(29) | 0.065 92(12) | ||||||
| 136 | 135.904 575 73(29) | 0.078 54(24) | ||||||
| 137 | 136.905 827 14(30) | 0.112 32(24) | ||||||
| 138 | 137.905 247 00(31) | 0.716 98(42) | ||||||
| ||||||||
