Octpentennium (Ope)

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