A) deuteron
B) alpha-particle
C) both (a) and (b)
D) sometimes deuteron and sometimes alpha particle
Correct Answer: B
Solution :
In order to compare the stability of the nuclei of different atoms, binding energy per nucleon is determined. Higher the binding energy per nucleon more stable is the nucleus. \[\therefore \]BE per nucleon of deuteron\[=\frac{1.125}{2}\] \[=0.5625\text{ }MeV\] BE per nucleon of alpha particle\[=\frac{7.2}{4}\] \[=1.8\text{ }MeV\] Since, binding energy per nucleon of alpha particle is more, hence it is more stable.
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