Biunoctium (Buo) is a superheavy synthetic element, and thus a standard atomic mass cannot be given. Like all synthetic elements, it is radioactive and has no stable isotopes. There is 1 predicted isotope of biunoctium, although it probably has more. As of 2012, no attempt has ever been made to synthesize any of the isotopes.


nuclide symbol Z(p) N(n) isotopic mass (u) half-life decay mode(s) daughter isotope(s) nuclear spin
622Buo 218[1] 404[1]


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