Octpentnilium (Opn)
Octpentnilium is the systematic name of the theoretical 850. element in the periodic table with a symbol of Opn and atomic number of 850. Octpentnilium, also known as element 850, has แ แแแแกยญแแ แแแชแแยญแแแ protons in its nucleus, and แ แแแแกยญแแ แแแชแแยญแแแ electrons in its shells.