Octennseptium (Oes)

Octennseptium is the systematic name of the theoretical 897e element in the periodic table with a symbol of Oes and atomic number of 897. Octennseptium, also known as element 897, has acht­honderd­zeven­en­negentig protons in its nucleus, and acht­honderd­zeven­en­negentig electrons in its shells.