Nihoonium
Nihoonium (lühend Nh; varasema nimetusega ununtrium, lühend Uut) on keemiline element järjenumbriga 113.
| 113 | 3 18 32 32 18 8 2 |
| Nh ? | |
| Nihoonium |
Nihooniumi stabiilseima leitud isotoobi massiarv on 284 ja poolestusaeg 0,48 sekundit.
Juunis 2016 tehti ettepanek nimetada senine ununtrium nihooniumiks (ladina Nihonium, lühend Nh). 28. novembril 2016 muudeti elemendi nimetus ametlikult nihooniumiks.
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