(this element does not have any stable isotopes)
Atomic weight of the most stable isotope: 237.0481736(19) u
| Isotope | Atomic weight/u | Half-life |
| 236 | 236.046570(54) | 153e+3 y 5 |
| 237 | 237.0481736(19) | 2.144e+6 y 7 |
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)
