For a nucleus ${ }_{\mathrm{A}}^{\mathrm{A}} \mathrm{X}$ having mass number $\mathrm{A}$ and atomic number $\mathrm{Z}$ A. The surface energy per nucleon $\left(b_{\mathrm{s}}\right)=-a_{1} A^{2 / 3}$. B. The Coulomb contribution to the binding energy $\mathrm{b}_{\mathrm{c}}=-a_{2} \frac{Z(Z-1)}{A^{4 / 3}}$ C. The volume energy $\mathrm{b}_{\mathrm{v}}=a_{3} A$ D. Decrease in the binding energy is proportional to surface area. E. While estimating the surface energy, it is assumed that each nucleon interacts with 12 nucleons. ( $a_{1}, a_{2}$ and $a_{3}$ are constants) Choose the most appropriate answer from the options given below:

Question

For a nucleus ${ }_{\mathrm{A}}^{\mathrm{A}} \mathrm{X}$ having mass number $\mathrm{A}$ and atomic number $\mathrm{Z}$

A. The surface energy per nucleon $\left(b_{\mathrm{s}}\right)=-a_{1} A^{2 / 3}$.

B. The Coulomb contribution to the binding energy $\mathrm{b}_{\mathrm{c}}=-a_{2} \frac{Z(Z-1)}{A^{4 / 3}}$

C. The volume energy $\mathrm{b}_{\mathrm{v}}=a_{3} A$

D. Decrease in the binding energy is proportional to surface area.

E. While estimating the surface energy, it is assumed that each nucleon interacts with 12 nucleons. ( $a_{1}, a_{2}$ and $a_{3}$ are constants)

Choose the most appropriate answer from the options given below:

C, D only

B, C, E only

B, C only

A, B, C, D only

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