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(A) Find the radius of nucleus of an ato...

(A) Find the radius of nucleus of an atom having atomic mass number equal to `125. ("Take" R_(0)=1.3xx10^(-15) m)` (B) Find the distance of closest approach when an `alpha` particle is projected towards the nucleus of silver atom having speed `v`. (mass of `alpha` particle `=m_(alpha)`, atomic number pf `Ag=47`)

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(A) The positively charged nucleus of an atom has a radius of almost 10^(-15) m : (R) : In alpha -particle scattering experiment, the distance of closest approach for a - particles is ~= 10^(-15) m.