Ununennium

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Ununennium (Listeni /ˌjuːnəˈnɛniəm/),[1] or eka-francium, is the temporary name of a hypothetical chemical element in the periodic table that has the temporary symbol Uue and has the atomic number 119. Since it is below the alkali metals it might have properties similar to those of francium or caesium. Like other alkali metals, it should be extremely reactive with water and air. A predicted oxidation state is 1.

Ununennium would be the first element in the eighth period of the periodic table and the seventh alkali metal.

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