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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    Which one of the following options is correct?

    A) Mass number = atomic number + number of neutrons

    B) Mass number = atomic number / number of neutrons

    C) Mass number = atomic number \[\times \]number of neutrons

    D) Mass number = atomic number  \[-\] number of neutrons

    E) None of these

    Correct Answer: A

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