Isotopes of nihonium

Isotopes of nihonium (113Nh)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
278Nh synth 2.0 ms α 274Rg
282Nh synth 61 ms α 278Rg
283Nh synth 123 ms α 279Rg
284Nh synth 0.90 s α 280Rg
ε 284Cn
285Nh synth 2.1 s α 281Rg
SF –
286Nh synth 9.5 s α 282Rg
287Nh synth 5.5 s?[2] α 283Rg
290Nh synth 2 s?[3] α 286Rg

Nihonium (113Nh) is a synthetic element. Being synthetic, a standard atomic weight cannot be given and like all artificial elements, it has no stable isotopes. The first isotope to be synthesized was 284Nh as a decay product of 288Mc in 2003. The first isotope to be directly synthesized was 278Nh in 2004. There are 6 known radioisotopes from 278Nh to 286Nh, along with the unconfirmed 287Nh and 290Nh. The longest-lived isotope is 286Nh with a half-life of 9.5 seconds.

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