a. Define isotopes. Give any two examples of it.

b. All the nuclei have nearly the same density. Justify. [2]

c. A fusion reaction is more energetic than fission reaction. Justify.


d. Calculate the binding energy per nucleon of 3Li7 from the given data below.

(mass of 3Li = 7.01435 amu, mass of on¹ = 1.00867 amu and mass of 1H1 = 1.00728 amu)
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