Septnilennium (Sne)

Septnilennium is the systematic name of the theoretical thứ 709 element in the periodic table with a symbol of Sne and atomic number of 709. Septnilennium, also known as element 709, has bảy trăm lẻ chín protons in its nucleus, and bảy trăm lẻ chín electrons in its shells.