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 devyni šimtai devyniasdešimt vienas protons in its nucleus, and devyni šimtai devyniasdešimt vienas electrons in its shells.