Answer to Question 3

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Number of protons = 29; number of neutrons = 63 29 = 34.

Mass of protons = 29 1.007276 = 29.211004 u

Mass of neutrons = 34 1.008665 = 34.29461 u

Total mass = 29.211004 u + 34.29461 u = 63.505614 u

Mass defect = 63.505614 u 62.91367 u = 0.591944 u

Mass defect in kg = 0.591944 u 1.661 10-27 kg = 9.83218 10-28 kg

Binding energy = mc2 = 9.83218 10-28 kg (3 108 m s-1)2 = 8.85 10-11 J

Binding energy in eV = 8.85 10-11 J 1.6 10-19 J eV-1 = 5.53 108 eV

Binding energy per nucleon =  5.53 108 eV 63 = 8.78 106 eV