oganessium
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English[edit]
Noun[edit]
oganessium (uncountable)
- A rejected name for oganesson
Usage notes[edit]
According to IUPAC guidelines in place in 2006, when said element was discovered, all new elements should have names ending in -ium. However, by the time oganesson was named (2016), IUPAC had changed its mind, hence the name oganesson, rather than oganessium.