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 sitt mija u tlieta u erbgħin protons in its nucleus, and sitt mija u tlieta u erbgħin electrons in its shells.