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 nyolc­száz­ötven­kilenc protons in its nucleus, and nyolc­száz­ötven­kilenc electrons in its shells.