Octpentennium (Ope)

Octpentennium is the systematic name of the theoretical 859. element in the periodic table with a symbol of Ope and atomic number of 859. Octpentennium, also known as element 859, has otte­hundrede og ni­og­halvtreds protons in its nucleus, and otte­hundrede og ni­og­halvtreds electrons in its shells.