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Pronounced: /ˌju nəˈnɛniəm/ A temporary systematic name for the [hypothetical] chemical element with the [atomic number] 119 and the symbol Uue, assigned by IUPAC. Ununennium is expected to be the first element in the eighth period of the periodic table and a member of the alkali metal group. Its properties have not been observed and are currently predicted only through theoretical models. If [discovered] and confirmed, it will receive a permanent name.
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