Assuming the radius of a nucleus to be equal to R = 1.3A 1/3 × 10 –15 m, where A is its mass number, evaluate the density of nuclei and the number of nucleons per unit volume of the nucleus. Take mass of one nucleon = 1.67 × 10 –27 kg
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The radius of nucleus is 
where 
mass number 
The volume of nuclues is 
A 
mass number 
number of necleons
∴ The number of nucleons per unit volume is
Density is 
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