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9th Class Science Sample Paper Science Olympiad Model Test Paper-20

  • question_answer
    Copper consists of two isotopes : \[{}^{63}Cu\] (relative abundance 69%) and \[{}^{65}Cu\](relative abundance 31%). Calculate the relative atomic mass of copper.

    A) 58.8     

    B) 63.62                                           

    C) 60.12

    D) 69.63                                         

    E) None of these

    Correct Answer: B

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