Octpentseptium (Ops)
Octpentseptium is the systematic name of the theoretical 857. element in the periodic table with a symbol of Ops and atomic number of 857. Octpentseptium, also known as element 857, has aštuoni šimtai penkiasdešimt septyni protons in its nucleus, and aštuoni šimtai penkiasdešimt septyni electrons in its shells.