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NEET Sample Paper NEET Sample Test Paper-38

  • question_answer
    The relative abundance of isotopes of an element shows the composition as \[{{\,}^{200}}X=90%,{{\,}^{199}}X=8.0%,{{\,}^{202}}X=2.0%\] The average atomic mass of element is

    A)  201 amu    

    B)  202 amu

    C)  199 amu    

    D)  200 amu

    Correct Answer: D

    Solution :

     Av. Atomic mass \[=\frac{200\times 90+199\times 8+202\times 2}{100}\] = 200 amu


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