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