Septseptunium (Ssu)

Septseptunium is the systematic name of the theoretical 771-ші element in the periodic table with a symbol of Ssu and atomic number of 771. Septseptunium, also known as element 771, has жеті жүз жетпіс бір protons in its nucleus, and жеті жүз жетпіс бір electrons in its shells.