Guys please help tomorrow is my exam,, describe briefly and no google answers because I have already checked there..
Describe how the scattering of α-particles by thin metal foils provides evidence for the nuclear atom.
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The experimental evidence behind the discovery involved the scattering of a particle beam after passing through a thin gold foil obstruction. The particles used for the experiment - alpha particles - are positive, dense, and can be emitted by a radioactive source.
Let us first recapitulate the background of the Rutherford experiments.
It was a fortunate coincidence that alpha particles scattering was studied as these interact much more than beta particles and would undergo Interactions which beta particles would not have.
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A beam of a-particles was passed through the foil and some of the alpha particles (are positive) came out from different directions/ repelled. This meant that the positive charge in atoms was highly concentrated at one point for it to scatter the alpha particles. This shows that the atom had a positive nucleus with electrons outside the nucleus.