JEE Main & Advanced AIEEE Solved Paper-2009

  • question_answer
    Copper crystallizes in \[fcc\] with a unit cell length of 361 pm. What is the radius of copper atom?     AIEEE  Solved  Paper-2009

    A) 109 pm                

    B) 127 pm

    C)        157 pm

    D)        181 pm

    Correct Answer: B

    Solution :

    For FCC \[\sqrt{2}a=4r\] \[\therefore \]\[r=\frac{\sqrt{2}\times 361}{4}=127\,pm\]


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