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NEET Sample Paper NEET Sample Test Paper-13

  • question_answer
    A given metal crystallises out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom?

    A)  80 pm                         

    B)  108 pm

    C)  40 pm                         

    D)  127 pm

    Correct Answer: D

    Solution :

     Z = 4, i.e., structure is fcc. Hence, \[r=\frac{a}{2\sqrt{2}}=\frac{361}{2\sqrt{2}}=127.65\,pm\approx 127\,pm.\]


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