Septoctseptium (Sos)
Septoctseptium is the systematic name of the theoretical 787a element in the periodic table with a symbol of Sos and atomic number of 787. Septoctseptium, also known as element 787, has şapte sute optzeci şi şapte protons in its nucleus, and şapte sute optzeci şi şapte electrons in its shells.