Assertion :Metallic radius is the measurement of an atom's size with regards to metal elements. Reason: Half the internuclear distance between the adjacent metal atoms in a metallic crystal is known as metallic radius.

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
A metallic radius is the measurement of an atom's size with regards to metal elements only.

The metallic radius is the radius of an atom joined by metallic bond. The metallic radius is half of the total distance between the nuclei of two adjacent atoms in a metallic cluster. Since a metal will be a group of atoms of the same element, the distance of each atom will be the same.

Hence, half the internuclear distance between the adjacent metal atoms in a metallic crystal.

Option A is correct.

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