Assertion :Electron capture occurs more often than positron emission in heavy elements. Reason: Heavy elements exhibit radioactivity.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Electron capture occurs more often than positron emission in heavy elements. This is because if position emission is energetically allowed, electron capture is necessarily allowed,but the reverse is not true i.e. when electron capture is energetically allowed, positron emission is not necessarily allowed.

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