Octseptnilium (Osn)
Octseptnilium is the systematic name of the theoretical 870वाँ element in the periodic table with a symbol of Osn and atomic number of 870. Octseptnilium, also known as element 870, has आठ सौ सत्तर protons in its nucleus, and आठ सौ सत्तर electrons in its shells.