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Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    How many number of atoms are there in a cube based unit cell having one atom on each comer and two atoms on each body diagonal of cube?

    A)  8               

    B)  6

    C)  4               

    D)  9

    Correct Answer: D

    Solution :

     There are four body diagonals. Atoms on the body diagonals are not shared by any other unit cell. Contribution by atoms on corners \[=8\times \frac{1}{8}=1\]and contribution by atoms on body diagonal\[=2\times 4=8.\]


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