Octpentseptium (Ops)
Octpentseptium is the systematic name of the theoretical 857वाँ element in the periodic table with a symbol of Ops and atomic number of 857. Octpentseptium, also known as element 857, has आठ सौ सत्तावन protons in its nucleus, and आठ सौ सत्तावन electrons in its shells.