Pentpentunium (Ppu)

Pentpentunium is the systematic name of the theoretical 551e element in the periodic table with a symbol of Ppu and atomic number of 551. Pentpentunium, also known as element 551, has vijf­honderd­een­en­vijftig protons in its nucleus, and vijf­honderd­een­en­vijftig electrons in its shells.