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In the gold foil experiment of Geiger and Marsden, which paved the way for Rutherford’s model of an atom, ~ 1.00% of the α-particles were found to deflect at angles > 50°. If one mole of alpha particles were bombarded on the gold foil, compute the number of alpha particles that would deflect at angles less than 50°.
Percentage of alpha particles deflected more than 50° = 1%
Percentage of alpha particles deflected less than 50° = 100 -1 = 99%
Number of alpha particles bombarded = 1 mole = 6.022\times10^{23} particles
Number of particles that deflected at an angle less than 50°
= \frac{99}{100}\times6.022\times10^{23}
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