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    Question

    Which radioactive element is used in heart

    pacemakers?
    A Plutonium-238 Correct Answer Incorrect Answer
    B Deuterium Correct Answer Incorrect Answer
    C Plutonium Correct Answer Incorrect Answer
    D Radium Correct Answer Incorrect Answer

    Solution

    Plutonium-238 is used in heart pacemakers because it provides a long-lasting energy source through its radioactive decay.

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