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9th Class Science Sample Paper Science Olympiad Model Test Paper-7

  • question_answer
    If bromine atom is in the form of say two isotopes \[{}_{35}^{79}Br\,\,\,(49.7%)\,\,\,and\,\,{}_{35}^{81}Br\,\,\,\,(50.3%)\]then find out the atomic mass of bromine atom.

    A) 80.006

    B)  76.023

    C)  81.210

    D)  85.235

    E)  None of these

    Correct Answer: A

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