Octpentpentium (Opp)
Octpentpentium is the systematic name of the theoretical 855-ші element in the periodic table with a symbol of Opp and atomic number of 855. Octpentpentium, also known as element 855, has сегіз жүз елу бес protons in its nucleus, and сегіз жүз елу бес electrons in its shells.