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

  • question_answer
    Which of the following statements is correct about isobars?

    A) Isobars have different mass number but same atomic numbers

    B) Isobars have same mass number but different atomic numbers

    C) Isobars have same number of electrons in last orbit

    D) Isobars have same number of neutrons in the nucleus

    E) None of these

    Correct Answer: B


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