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J & K CET Medical J & K - CET Medical Solved Paper-2006

  • question_answer
    Ratio of the radii of the nuclei with mass numbers 8 and 27 would be :

    A)  27/8                                     

    B)  8/27

    C)  2/3                                       

    D)  3/2

    Correct Answer: C

    Solution :

                     The radii of a nuclei\[(R)\]varies with atomic number A as \[R=k{{A}^{1/3}}\] Given,   \[{{A}_{1}}=8,\] \[{{A}_{2}}=27\] \[\therefore \]  \[\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{{{(8)}^{1/3}}}{{{(27)}^{1/3}}}=\frac{2}{3}\]     


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