Octseptnilium (Osn)

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