Octnilpentium (Onp)

Octnilpentium is the systematic name of the theoretical 805. element in the periodic table with a symbol of Onp and atomic number of 805. Octnilpentium, also known as element 805, has aacht­honnert­fënnef protons in its nucleus, and aacht­honnert­fënnef electrons in its shells.