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 எண்நூறு ஐம்பது எட்டு protons in its nucleus, and எண்நூறு ஐம்பது எட்டு electrons in its shells.