Ennennseptium (Ees)

Ennennseptium is the systematic name of the theoretical 997e element in the periodic table with a symbol of Ees and atomic number of 997. Ennennseptium, also known as element 997, has negen­honderd­zeven­en­negentig protons in its nucleus, and negen­honderd­zeven­en­negentig electrons in its shells.