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AMU Medical AMU Solved Paper-2014

  • question_answer
    Copper crystallises in a face centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

    A)  157                                       

    B)  181

    C)  108                                       

    D)  128

    Correct Answer: D

    Solution :

                     For fee lattice, radius, \[r=\frac{a}{2\sqrt{2}}\]                 \[=\frac{361}{2\times 1.414}\] = 127.65pm                 \[\approx \] 128pm


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