Assertion :Elements belonging to the same group have similar chemical properties. Reason: Elements of a group have same number of valence electrons.

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
Elements present in the same group have the same number of valence electrons.

Therefore, elements present in the same group have similar chemical properties.

For example Group - I contains elements Li, Na, K and Rb all of them have 1 valence electron. So the chemical properties are same.

Option A is correct.

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