Ennennunium (Eeu)

Ennennunium is the systematic name of the theoretical 991. element in the periodic table with a symbol of Eeu and atomic number of 991. Ennennunium, also known as element 991, has deväť­sto deväťdesiat­jeden protons in its nucleus, and deväť­sto deväťdesiat­jeden electrons in its shells.