Pentquadnilium (Pqn)

Pentquadnilium is the systematic name of the theoretical 540e element in the periodic table with a symbol of Pqn and atomic number of 540. Pentquadnilium, also known as element 540, has vijf­honderd­veertig protons in its nucleus, and vijf­honderd­veertig electrons in its shells.