Octnilseptium (Ons)
Octnilseptium is the systematic name of the theoretical ۸۰۷. element in the periodic table with a symbol of Ons and atomic number of 807. Octnilseptium, also known as element 807, has هشتصد و هفت protons in its nucleus, and هشتصد و هفت electrons in its shells.