The nuclear mass of 56fe is 55.9207 amu. calculate the binding energy per nucleon for 56fe.

Fe (iron) has 26 protons, 30 neutrons and 26 electrons. In order to calculate the binding energy, first you need to find the total mass of all particles in the nucleus:

26 x mass of proton + 30 x mass of neutron (all in a. m. u.) = say "m"

Mass defect is m - 55.9207 amu, then convert it into grams and put in equation E = mc2 to get binding energy of Fe.

Divide it by number of nucleons to get binding energy per nucleon.