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