Given below are two statements, one is labelled as
Assertion (A): The ionic radii of $O^{- 2}$ ^- and $M g^{+ 2}$ are same.
Reason (R): Both $O to the power of negative 2 end exponent$ and $M g to the power of plus 2 end exponent$ are isoelectronic species.
correct answer from the options given below

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Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Assertion is false and Reason is true

Assertion is true and Reason is false

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.

answer is D.

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Detailed Solution

Assertion is wrong because ionic radii of $O to the power of negative 2 end exponent$ is greater than $M g to the power of plus 2 end exponent$

Reason is correct statement as both $M g to the power of plus 2 end exponent$ and $O to the power of negative 2 end exponent$ have 10 electrons

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