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The radius of 2^nd orbit of Li^2+ ion is x, radius of 3^rd orbit of Be^3+ will be

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The radius of 2nd orbit of Li2+ ion is x, radius of 3rd orbit of Be3+ will be

(1) 15/27 x

(2) 9/8 x

(3) 27/16 x

(4) 5/17 x

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Correct option is (3) 27/16 x

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