CBSE Class 12 · 2023 · Modern PhysicsMultiple Choice

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The curve of binding energy per nucleon as a function of atomic mass number has a sharp peak for the helium nucleus. This implies that the helium nucleus is

(A)radioactive
(B)unstable
(C)easily fissionable
(D)more stable nucleus than its neighbours✓ Correct

Answer: (D)

Solution

A high binding energy per nucleon means the nucleus is tightly bound and therefore stable.
A sharp peak at helium shows it is more tightly bound (more stable) than its neighbouring nuclei.

(D) more stable nucleus than its neighbours

CBSE Class 12 Board · 2023 · Single correct option

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