Septseptseptium (Sss)

Septseptseptium is the systematic name of the theoretical 777. element in the periodic table with a symbol of Sss and atomic number of 777. Septseptseptium, also known as element 777, has sedem­sto sedemdesiat­sedem protons in its nucleus, and sedem­sto sedemdesiat­sedem electrons in its shells.