Octquadnilium (Oqn)

Octquadnilium is the systematic name of the theoretical 840'inci element in the periodic table with a symbol of Oqn and atomic number of 840. Octquadnilium, also known as element 840, has səkkiz yüz qırx protons in its nucleus, and səkkiz yüz qırx electrons in its shells.