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Which consequence follows from increasing nucleon count in stable isotopes?

A)Binding energy per nucleon decreases
B)Fission cross-section strongly increases
C)Alpha decay probability diminishes smoothly
D)Half-life against beta decay shortens

💡 Explanation

Increasing the number of nucleons reduces the binding energy per nucleon because the strong nuclear force reaches a saturation point; therefore, the nucleus is held together less effectively and is intrinsically less stable, rather than promoting decay.

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