Hexquadtrium (Hqt)
Hexquadtrium is the systematic name of the theoretical 643. element in the periodic table with a symbol of Hqt and atomic number of 643. Hexquadtrium, also known as element 643, has šeši šimtai keturiasdešimt trys protons in its nucleus, and šeši šimtai keturiasdešimt trys electrons in its shells.