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NEET Chemistry The Solid State / ठोस प्रावस्था Question Bank Self Evaluation Test - The Solid State

  • question_answer
    Copper crystallises in fee with a unit length of 361pm. What is the radius of copper atom?

    A) 157pm             

    B) 128pm

    C) 108pm             

    D) 181pm

    Correct Answer: B

    Solution :

    [b] For fcc, \[r=\frac{\sqrt{2}a}{4}=\frac{a}{2\sqrt{2}}=0.3535a\] given \[a=361pm\] \[r=0.3535\times 361=128pm\]


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