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NEET AIPMT SOLVED PAPER SCREENING 2012

  • question_answer
    If the nuclear radius of \[^{27}Al\] is 3.6 Fermi, the approximate nuclear radius of \[^{64}Cu\] in Fermi is

    A) 2.4     

    B)                                        1.2                         

    C)        4.8                         

    D)        3.6

    Correct Answer: C

    Solution :

    Nuclear radius \[r\propto {{A}^{1/3}},\], where A is mass number \[r={{r}_{0}}{{A}^{1/3}}\] \[r={{r}_{0}}{{(27)}^{1/3}}=3{{r}_{0}}\] \[{{r}_{0}}\frac{3.6}{3}=1.2\,\text{fm}\] For \[^{\text{64}}\text{Cu}\]                 \[r={{r}_{0}}{{A}^{1/3}}\]                 \[=1.2\,\text{fm}\,{{(64)}^{1/3}}\]                 \[=4.8\,\text{fm}\,\]


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