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Question

-particles are scattered by the gold nucleus but not by the electrons.
It is, because


A
Electrons are much massive than particles
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B
-particles are massive than electrons but only about 2% massive for gold nucleus.
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C
particles are nearly of same mass or that of nucleus
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D
particles are positively charged.
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Solution

The correct option is D particles are positively charged.
Alpha particle get scattered due to repulsion by positive nucleus not due to heavy mass because α particle is positively charged
The scene of mass is considered only for mechanical scattering where collision takes place in our case the α particle doesn't touch nucleus it just reaches up to closest distance.
Option D is correct.



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