Ennennunium (Eeu)

Ennennunium is the systematic name of the theoretical ۹۹۱. element in the periodic table with a symbol of Eeu and atomic number of 991. Ennennunium, also known as element 991, has نهصد و نود و یک protons in its nucleus, and نهصد و نود و یک electrons in its shells.