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 neun­hundert­ein­und­neunzig protons in its nucleus, and neun­hundert­ein­und­neunzig electrons in its shells.