Question
On a hot sunny day, why do we feel pleasant sitting under a tree?
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In the gold foil experiment of Geiger and Marsden, that paved the way for Rutherford’s model of an atom, ~ 1.00% of the a-particles were found to deflect at angles > 50°. If one mole of a-particles were bombarded on the gold deflect at angles foil, compute the number of a-particles that would less than 50°.