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Entropy for a Reversible Process

Question

If $M$ is atomic weight , $A$ is mass number then $\frac{M - A}{A}$ represents :

A

Mass defect

B

Packing fraction

C

Binding energy

D

Chain reaction

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Solution

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Packing fraction is the mass defect per nucleon i.e. elementary particle in the nucleus. The difference between atomic weight and mass number i.e. mass of elementary particle in the nucleus is known as mass defect. Hence,
$p = \frac{Δ m}{A}$
$p = \frac{M - A}{A}$

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