(this element does not have any stable isotopes)
Atomic weight of the most stable isotope: 231.0358842(24) u
| Isotope | Atomic weight/u | Half-life |
| 230 | 230.0345410(35) | 17.4 d 5 |
| 231 | 231.0358842(24) | 3.276e+4 y 11 |
| 233 | 233.0402472(22) | 26.975 d 13 |
Units: y = year, d = day, h = hour, m = minute, s = second, ms = millisecond, µs = microsecond.
Numbers in italics are uncertainties with the same unit as the last digit of the half-life.
Atomic weights were obtained from NIST Database 144
The half-life of radioactive isotopes was obtained from the Nuclear Wallet Cards
The Atomic Line List does not contain any data for this element
(Atomic Line List v3.00b5)
