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Question

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

A
can easily be broken up
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B
is very stable
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C
can be used as fissionable material
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D
is radioactive
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Solution

The correct option is C is very stable
The elements high on the B.E. versus mass number plot are very tightly bound and hence, are stable. And the elements those are lower on this plot, are less tightly bound, are unstable.

Since the helium nucleus shows a peak on this plot so, it is very stable.

Hence, option B is correct.

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