Octpentoctium (Opo)

Octpentoctium is the systematic name of the theoretical 858. element in the periodic table with a symbol of Opo and atomic number of 858. Octpentoctium, also known as element 858, has aacht­honnert­aachtanfofzeg protons in its nucleus, and aacht­honnert­aachtanfofzeg electrons in its shells.