Pentpentunium (Ppu)

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