Hexquadquadium (Hqq)
Hexquadquadium is the systematic name of the theoretical 644-и element in the periodic table with a symbol of Hqq and atomic number of 644. Hexquadquadium, also known as element 644, has шестстотин четиресет и четири protons in its nucleus, and шестстотин четиресет и четири electrons in its shells.