Octpentunium (Opu)

Octpentunium is the systematic name of the theoretical 851. element in the periodic table with a symbol of Opu and atomic number of 851. Octpentunium, also known as element 851, has otte­hundrede og en­og­halvtreds protons in its nucleus, and otte­hundrede og en­og­halvtreds electrons in its shells.