What is the mass defect in atomic mass units (u) and in kilograms for the copper nucleus which has 63 nucleons, and a proton number of 29?  What is the binding energy in J and eV?  What is the binding energy per nucleon in eV?  The nuclear mass = 62.91367 u.     

Number of protons = 29; number of neutrons = 63 – 29 = 34. (P)

Mass of protons = 29 ´ 1.007276 = 29.211004 u (P)

Mass of neutrons = 34 ´ 1.008665 = 34.29461 u (P)

Total mass = 29.211004 u + 34.29461 u = 63.505614 u (P)

Mass defect = 63.505614 u – 62.91367 u = 0.591944 u (P)

Mass defect in kg = 0.591944 ´ 1.661 ´ 10^-27 = 9.83218 ´ 10^-28 kg (P)

Binding energy = mc² = 9.83218 ´ 10^-28 kg ´ (3 ´ 10⁸ m/s)² = 8.85 ´ 10^-11 J (P)

Binding energy in eV = 8.85 ´ 10^-11 J ¸ 1.6 ´ 10^-19 J/eV = 5.53 ´ 10⁸ eV (P)

Binding energy per nucleon =  5.53 ´ 10⁸ eV ¸ 63 = 8.78 ´ 10⁶ eV (P)