ununuium
Unununium is a temporary name given to the hypothetical chemical element with the atomic number 119. It is part of the 7th period of the periodic table and is expected to be an alkali metal, similar to its lighter homologues, hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium. The name "unununium" is derived from the Latin words "unus" meaning one, and "un" meaning nine, reflecting its atomic number (119 = 1 + 99).
The discovery of unununium is a subject of ongoing research. It is predicted to be highly unstable
The chemical properties of unununium are largely unknown due to its extreme instability. However, theoretical calculations
Unununium is not yet officially recognized by the International Union of Pure and Applied Chemistry (IUPAC),