Pentpentnilium (Ppn)

Pentpentnilium is the systematic name of the theoretical 550. element in the periodic table with a symbol of Ppn and atomic number of 550. Pentpentnilium, also known as element 550, has penki šimtai penkiasdešimt protons in its nucleus, and penki šimtai penkiasdešimt electrons in its shells.