Solution

Find the mass defect and binding energy of the deuterium. The mass of deuteron is $3.3435 \times 10^{-27}\,\mathrm{kg}$. (mass of proton $m_{p} = 1.6726 \times 10^{-27}$, mass of neutron $m_{n} = 1.6749 \times 10^{-27}$)