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In 1911, the physical Ernest Rutherford ...

In 1911, the physical Ernest Rutherford discovered that atoms have a tiny , dense nucleus by shooting positively charged particles at a very thin gold foil. A key physical property which led Rutherford to use gold was that it was

A

electrically conducting

B

highly malleable

C

shiny

D

non-reactive

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The correct Answer is:
B
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Rutherford's alpha particle scattering experiment on thin gold foil was responsible for the discovery of

Which one did Rutherford consider to be supported by the results of experiments in which a-particles were scattered by gold foil?

At the suggestion of Earnest Rutherford, hans Geiger and ernest Marsden bombarded a thin gold foil by alpha -particles from a polonium source. It was expected that alpha -particles would go right through the foil with hardly any deflection. Although, most of the alpha particles indeed were not deviated by much, a few were scattered through veryi large angles. Some were even scattered in the backward direction. The nly way to explain the results, rutherford found, was to picture an atom as being compoed of a tiny nucleus in which its positive charge and nearly all its mass are concentrated. Scattering of alpha -particles is proportional to target thickness and is inversely proportional to the fourth power of sin((theta)/(2)) , where, theta is scattering angle. Distance of closest approach may be calculated as: r_("min")=(Z_(1)Z_(2)e^(2))/(4piepsi_(0)K) where, K=kinetic energy of alpha -particles. Q. Rutherford's alpha -particle scattering led to the conclusion that:

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