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Pronunciation varies by accent · noun
(dated) The systematic element name for the chemical element with atomic number 118 (symbol Uuo); now named oganesson..
“The chemistry community is eager to see its most cherished table finally being completed down to the seventh row. IUPAC has now initiated the process of formalizing names and symbols for these elements temporarily named as ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118)” said Professor Jan Reedijk, President of the Inorganic Chemistry Division of IUPAC.
Prior to and during the naming process, the element may be referred to by its atomic number, for example as in ‘element 118’, or by its provisional systematic name, ‘ununoctium’.
Use ununoctium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ununoctium means (dated) The systematic element name for the chemical element with atomic number 118 (symbol Uuo); now named oganesson..
Common synonyms include eka-radon, oganesson.
The opposite depends on the specific sense.
“The chemistry community is eager to see its most cherished table finally being completed down to the seventh row. IUPAC has now initiated the process of formalizing names and symbols for these elements temporarily named as ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118)” said Professor Jan Reedijk, President of the Inorganic Chemistry Division of IUPAC.
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