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 osem­sto päťdesiat­deväť protons in its nucleus, and osem­sto päťdesiat­deväť electrons in its shells.