Septoctunium (Sou)

Septoctunium is the systematic name of the theoretical ۷۸۱. element in the periodic table with a symbol of Sou and atomic number of 781. Septoctunium, also known as element 781, has هفتصد و هشتاد و یک protons in its nucleus, and هفتصد و هشتاد و یک electrons in its shells.