Average atomic weight: 200.592(3) u
| Isotope | Fraction | Atomic weight/u |
| 196 | 0.0015(1) | 195.9658326(32) |
| 198 | 0.0997(20) | 197.96676860(52) |
| 199 | 0.1687(22) | 198.96828064(46) |
| 200 | 0.2310(19) | 199.96832659(47) |
| 201 | 0.1318(9) | 200.97030284(69) |
| 202 | 0.2986(26) | 201.97064340(69) |
| 204 | 0.0687(15) | 203.97349398(53) |
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)
