Octpentseptium (Ops)

Octpentseptium is the systematic name of the theoretical 857e element in the periodic table with a symbol of Ops and atomic number of 857. Octpentseptium, also known as element 857, has acht­honderd­zeven­en­vijftig protons in its nucleus, and acht­honderd­zeven­en­vijftig electrons in its shells.