Hexquadnilium (Hqn)

Hexquadnilium is the systematic name of the theoretical 640e element in the periodic table with a symbol of Hqn and atomic number of 640. Hexquadnilium, also known as element 640, has zes­honderd­veertig protons in its nucleus, and zes­honderd­veertig electrons in its shells.