Septoctseptium (Sos)
Septoctseptium is the systematic name of the theoretical 787-и element in the periodic table with a symbol of Sos and atomic number of 787. Septoctseptium, also known as element 787, has седемстотин осемдесет и седем protons in its nucleus, and седемстотин осемдесет и седем electrons in its shells.