Septnilennium (Sne)

Septnilennium is the systematic name of the theoretical ٧٠٩. element in the periodic table with a symbol of Sne and atomic number of 709. Septnilennium, also known as element 709, has سبعة مائة وتسعة protons in its nucleus, and سبعة مائة وتسعة electrons in its shells.