In the Gold foil experiment of Geiger and Marsden, that paved the way for Rutherford’s model of an atom, ~ 1.00% of the α-particles were found to deflect at angles > 50º. If one mole of α-particles were bombarded on the gold foil, compute the number of α-particles that would deflect at angles less than 500.

AcademicChemistryNCERTClass 9

% of α-particles deflected more than 
50 =1% of α-particles.
% of α-particles deflected less than 
50 =100 – 1 = 99%
Number of α-particles bombarded = 1 mole = 
6.022×1023 particles.
Number of particles that deflected at an angle less than 50,
=(99/100) × 6.022 × 1023

= 5.96×1023
raja
Updated on 10-Oct-2022 13:32:36

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