(this element does not have any stable isotopes)
Atomic weight of the most stable isotope: 289.19363(89) u
| Isotope | Atomic weight/u | Half-life |
| 287 | 287.19070(52) | 32 ms +155-14 |
| 288 | 288.19274(62) | 87 ms +105-30 |
| 289 | 289.19363(89) | 0.22 s +26-8 |
| 290 | 290.19598(73) | 16 ms +76-7 |
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)
