Hexquadennium (Hqe)

Hexquadennium is the systematic name of the theoretical 649. element in the periodic table with a symbol of Hqe and atomic number of 649. Hexquadennium, also known as element 649, has seks­hundrede og ni­og­fyrre protons in its nucleus, and seks­hundrede og ni­og­fyrre electrons in its shells.