Hexquadennium (Hqe)

Hexquadennium is the systematic name of the theoretical 649ú element in the periodic table with a symbol of Hqe and atomic number of 649. Hexquadennium, also known as element 649, has sé chéad daichead a naoi protons in its nucleus, and sé chéad daichead a naoi electrons in its shells.