Hexhexquadium (Hhq)
Hexhexquadium is the systematic name of the theoretical 664ú element in the periodic table with a symbol of Hhq and atomic number of 664. Hexhexquadium, also known as element 664, has sé chéad seasca a ceathair protons in its nucleus, and sé chéad seasca a ceathair electrons in its shells.