Average atomic weight: 150.36(2) u
| Isotope | Fraction | Atomic weight/u |
| 144 | 0.0307(7) | 143.9120065(21) |
| 147 | 0.1499(18) | 146.9149044(19) |
| 148 | 0.1124(10) | 147.9148292(19) |
| 149 | 0.1382(7) | 148.9171921(18) |
| 150 | 0.0738(1) | 149.9172829(18) |
| 152 | 0.2675(16) | 151.9197397(18) |
| 154 | 0.2275(29) | 153.9222169(20) |
Atomic weights and isotopic compositions were obtained from NIST Database 144
The Atomic Line List does not contain any data for this element
(Atomic Line List v3.00b5)
