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