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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The I.E of Al is smaller than that of Mg because

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Correct option: C

I.E in Al pertains to the removal of p – electron which is relatively easy

Option C (I.E in Al pertains to the removal of p – electron which is relatively easy) is correct because Aluminum's outermost electron is in a p-orbital, which is easier to remove than Magnesium's s-orbital electrons.

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