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Nuclei — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsNuclei2 Marks
Question
$\ce{He_2^3}$ and $\ce{He_1^3}$ nuclei have the same mass number. Do they have the same binding energy?a
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Answer

The nuclei $\ce{He_2^3}$ and $\ce{He_1^3}$​​​​​​​ have the same mass number.
$\ce{He_2^3}$​​​​​​​ has two protons and one neutron.
​​​​​​​$\ce{He_2^3}$​​​​​​​ has one proton and two neutrons.
As $\ce{He3}$ has only one proton hence the repulsive force between protons is missing in $\ce{1He^3},$
so the binding energy of $\ce{1He^3}$​​​​​​​ is greater than that of $\ce{2He^3}$.

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