The mass defect for the nucleus of helium is 0.0302 amu. The binding energy per nucleon for helium in MeV is approximately. (1 amu=930 MeVc2)
The masses of neutron and proton are 1.0087 amu and 1.0073 amu respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass 4.0015 amu, the binding energy of the helium nucleus will be [1 amu= 931 MeV]