This displays binding energies of the isotopes with the highest binding energy by element. Thus only one isotope per element has the highest binding energy, and this is the value shown. Note that this does not necessarily mean that the isotope shown is the most stable for that element, because tritium has a higher binding energy that protium, but tritium is radioactive and protium is not.
The highest binding energy of all isotopes is exhibited by nickel-62 at 8.795MeV/nucleon. For lighter elements the binding energy decreases very quickly, but for the heavier elements it decreases only gradually with increasing atomic number. Uranium-218 with 7.64MeV/nucleon has the highest binding energy of all uranium isotopes, and hydrogen-3 (tritium) has the highest binding energy of all hydrogen isotopes, at 2.827MeV/nucleon.
