Ncert Exercises & Solutions

${He}_{2}^{3}$ and $H_{1}^{3}$ nuclei have the same mass number. Do they have the same binding energy?

Hint: The binding energy depends on the force between the nucleons.

Step 1: Find the comparative force between the nucleons in

{He}_{2}^{3}

and

H_{1}^{3}

Nuclei

{He}_{2}^{3}

and

H_{1}^{3}

have the same mass number.

{He}_{2}^{3}

has two proton and one neutron.

H_{1}^{3}

has one proton and two neutron. The repulsive force between protons is missing in

_{1} {He}^{3}

, so the binding energy of

_{1} {He}^{3}

is greater than that of

_{2} {He}^{3}