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  3. The radius of 27 Al 13 will be

. The radius of 27 Al 13 will be

(A) 1.2 ´ 10–15 m                                             (B) 27 ´ 10–15 m

(C) 10.8 ´ 10–15 m                                           (D) 3.6 ´ 10–15 m

 

Best Answer

(d)

            r = 1.2 ´ 10–25 A1/3m.

            For Al, A = 270

         r = 1.2 ´ 10–15 (27)1/3 m = 3.6 ´ 10–15m.

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