A narrow beam of alpha particles falls normally on a silver foil behind which a counter is
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A narrow beam of alpha particles falls normally on a silver foil behind which a counter is set to register the scattered particles. On substitution of platinum foil of the same mass thickness for the silver foil, the number of alpha particles registered per unit time increased η = 1.52 times. Compute the atomic number of platinum, assuming the atomic number of silver and the atomic masses of both platinum and silver to be known.
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