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The correct order of increasing number of alpha particles passing undeflected through the foils of Au, Ag, Cu, and Al of 1000 atoms thickness each in a stimulated alpha particle scattering experiment of Rutherford would be

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Au < Ag < Cu < Al

Al < Cu < Ag < Au

Au < Cu < Al < Ag

Ag < Cu < Al < Au

answer is A.

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Detailed Solution

From gold to aluminum atomic size increases and nuclear charge decreases more will be the deflection. Thus in gold number of undeflected particles will be the smallest.

Hence Au < Ag < Cu < Al.

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