Assertion: Atomic size of potassium is greater than that of sodium.Reason: As we go down the group, atomic radius increases.
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Assertion: Atomic size of potassium is greater than that of sodium. Reason: As we go down the group, atomic radius increases. ... Reason: As electron is added to the same shell when moving from left to right along a period, the force of attraction increases between the nucleus and the electron on the last shell.
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Answer:(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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