Octpentennium (Ope)
Octpentennium is the systematic name of the theoretical 859वाँ element in the periodic table with a symbol of Ope and atomic number of 859. Octpentennium, also known as element 859, has आठ सौ उनसठ protons in its nucleus, and आठ सौ उनसठ electrons in its shells.