Assertion: The negatively charged atom is always larger than the parent atom.
Reason: The addition of additional electrons decreases the effective nuclear charge pe electron.

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Both assertion and reason are correct, but the reason is not the correct explanation for assertion.

The assertion is correct, but the reason is incorrect

Both assertion and reason are correct, and reason is the correct explanation for assertion.

Both assertion and reason are incorrect

answer is A.

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Detailed Solution

As extra electron enters the same shell, then the effective nuclear charge per electron goes on decreasing, and the atomic radius increases. As a result, the size of anion increases.

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