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9th Class Science Sample Paper Science Olympiad Model Test Paper-18

  • 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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