Octquadnilium (Oqn)

Octquadnilium is the systematic name of the theoretical 840-шы element in the periodic table with a symbol of Oqn and atomic number of 840. Octquadnilium, also known as element 840, has сегіз жүз қырық protons in its nucleus, and сегіз жүз қырық electrons in its shells.