Twelve different isotopes of bohrium have been reported with atomic masses 260–262, 264–267, 270–272, 274, and 278, one of which, bohrium-262, has a known metastable state. All of these but the unconfirmed 278Bh decay only through alpha decay, although some unknown bohrium isotopes are predicted to undergo spontaneous fission.
Twelve distinct isotopes of bohrium have been identified with atomic masses ranging from 260 to 278. Among them, bohrium-262 is known to be metastable.  Most bohrium isotopes decay solely through alpha emission, but some unidentified isotopes are predicted to undergo spontaneous fission.