Question

    Which of the following is not an isotope of oxygen?

    A O-15 Correct Answer Incorrect Answer
    B O-16 Correct Answer Incorrect Answer
    C O-17 Correct Answer Incorrect Answer
    D O-18 Correct Answer Incorrect Answer

    Solution

    Oxygen has three stable isotopes: O-16, O-17, and O-18. O-15 is not a naturally occurring stable isotope and is used in medical imaging as a radioactive tracer.

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