NEET Physics Question - Modern Physics

Assertion (A): Nucleus having more binding energy is more stable.

Reason (R): Stability increases with increase in number of nucleons.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is false. A nucleus with higher *total* binding energy is not necessarily more stable; stability is determined by binding energy *per nucleon*. For example, \(^{238}U\) has more total binding energy than \(^{56}Fe\) but is less stable. Reason (R) is also false. Nuclear stability increases with nucleon number up to (A approx 56) (Iron) and then decreases for heavier nuclei.

Rankers Physics

Nuclear Stability and Binding Energy

Solution:

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