Question 147: Atoms & Nuclei

Question

The mass of proton, neutron and helium nucleus are respectively $$1.0073~u,1.0087~u$$ and $$4.0015~u$$. The binding energy of helium nucleus is :

Accepted Answer

Mass defect $=2($ Mass of $p+$ mass of $n)-$ mass of $\mathrm{He}$ nucleus
$$
\begin{aligned}
& \Delta m=0.0305 u \\
& 	ext { B.E }=931.5 	imes \Delta m=931.5 	imes 0.0305 \\
& =28.4 \mathrm{MeV}
\end{aligned}
$$

Answer

$$28.4~\mathrm{MeV}$$

Answer

$$56.8~\mathrm{MeV}$$

Answer

$$7.1~\mathrm{MeV}$$

Answer

$$14.2~\mathrm{MeV}$$

Atoms & Nuclei

The mass of proton, neutron and helium nucleus are respectively $1.0073~u,1.0087~u and 4.0015~u$. The binding energy of helium nucleus is :

Choose the correct answer: