tennessium
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English[edit]
Noun[edit]
tennessium (uncountable)
- A rejected name for tennessine
Usage notes[edit]
According to IUPAC guidelines in place in 2010, when said element was discovered, all new elements should have names ending in -ium. However, by the time tennessine was named (2016), IUPAC had changed its mind, hence the name tennessine, rather than tennessium.