Assertion :Electrons revolve round the nucleus at high speeds. Reason: The motion of electrons counterbalances the nuclear forces of attraction.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
According to Niels Bohr, In an atom electrons move in a fixed circular path. If a particle is moving in a circular path a centripetal force is required. Required centripetal force is achieved by electric force(force between nucleus and electron).

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Choose the correct option.

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