Octquadnilium (Oqn)

Octquadnilium is the systematic name of the theoretical 840वाँ element in the periodic table with a symbol of Oqn and atomic number of 840. Octquadnilium, also known as element 840, has आठ सौ चालीस protons in its nucleus, and आठ सौ चालीस electrons in its shells.