Septseptennium (Sse)

Septseptennium is the systematic name of the theoretical 779e element in the periodic table with a symbol of Sse and atomic number of 779. Septseptennium, also known as element 779, has zeven­honderd­negen­en­zeventig protons in its nucleus, and zeven­honderd­negen­en­zeventig electrons in its shells.