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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Among

Mg,{\mkern 1mu} M{g^{2 + }},{\mkern 1mu} Al\,\,\,{\mkern 1mu} \mathrm{and}{\mkern 1mu} {\mkern 1mu} A{l^{3 + }}

which will have the largest and the smallest size respectively

View answer and explanation

Correct option: A

Mg,\,A{l^{3 + }}

Option A (

Mg, Al^{3+}

) is correct because cations are smaller than their parent atoms, and the size decreases with increasing positive charge. Anions are larger than their parent atoms.

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