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Alpha particle scattering experiment

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Assertion : During alpha -particles scattering experiment, 99% of the alpha -particles get deflected through very large angles. Reason : The nuclei of atoms are positively charged and repel alpha -particles which are also positively charged.

Rutherford's alpha( alpha ) particles scattering experiment resulted into discovery of

(A) in the experiment of alpha particle scattering, extremely thin gold foils are preferred over other metals. (R)gold is a ductile material.

Rutherford's alpha particle dispersion experiment concludes that

Which of the following conclusions could not be derived from Rutherford's α-particle scattering experiment?

Alpha particles are

When a silver foil (Z = 47) was used in an alpha ray scattering experiment , the number of alpha -particles scattered at 30^(@) was found to be 200 per minute. If the silver foil is replaced by alumninium (z = 13) foil of same thickness, the number of alpha -particles scattered per minute at 30^(@) is nearly equal to

Why did Rutherford select a gold foil in his alpha -ray scattering experiment ?

Source of alpha -particles used in scattering experiment was

Energy of the beam of alpha -particles used by Geiger and Marsden in scattering experiment is