Ennennennium (Eee)

Ennennennium is the systematic name of the theoretical 999. element in the periodic table with a symbol of Eee and atomic number of 999. Ennennennium, also known as element 999, has deväť­sto deväťdesiat­deväť protons in its nucleus, and deväť­sto deväťdesiat­deväť electrons in its shells.