(this element does not have any stable isotopes)
Atomic weight of the most stable isotope: 144.9127559(33) u
| Isotope | Atomic weight/u | Half-life |
| 141 | 140.913555(15) | 20.90 m 5 |
| 143 | 142.9109383(34) | 265 d 7 |
| 144 | 143.9125964(34) | 363 d 14 |
| 145 | 144.9127559(33) | 17.7 y 4 |
| 146 | 145.9147024(48) | 5.53 y 5 |
| 147 | 146.9151450(19) | 2.6234 y 2 |
| 148 | 147.9174819(63) | 5.368 d 7 |
| 149 | 148.9183423(27) | 53.08 h 5 |
| 150 | 149.920991(22) | 2.698 h 15 |
| 151 | 150.9212175(51) | 28.40 h 4 |
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)
