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Assertion: Shielding effect increases as we go down the group. Reason: More is the number of electrons in the penultimate shell, more is shielding.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
Answer» Correct Answer - A Both assertion and reason are true and reason is the correct explanation of assertion. The phenomenon is which the Penulimate Shel `(n-1)` electorns act as screen or shield in between nucles and valence shell electrons thereby reducing the effective nuclear charge is known as shielding effect. |
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