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(D) The experimental evidence for the existence of the atomic nucleus was provided by the Rutherford $\alpha$-particle scattering experiment. In this

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Alpha scattering by a thin metal foil

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(D) The experimental evidence for the existence of the atomic nucleus was provided by the Rutherford $\alpha$-particle scattering experiment. In this experiment,a beam of $\alpha$-particles was directed at a thin gold foil. The observation that some $\alpha$-particles were deflected at large angles and some even bounced back led to the conclusion that the positive charge and most of the mass of the atom are concentrated in a very small central region called the nucleus.

Experimental evidence for the existence of the atomic nucleus comes from

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