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