Assertion : $L i$ and $M g$ Elements are called bridge elements. Reason: Period $2$ elements exhibit show similar properties with period $3$ elements. Hence they are called as bridge elements.

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
Period 2 elements exhibit show similar properties with period 3 elements. e.g: $L i$ has properties similar to $M g$ , and Be has properties similar to $A l$ . Hence they are called as bridge elements.

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