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    Question

    A radioactive substance

    emits?
    A alpha particle Correct Answer Incorrect Answer
    B beta particle Correct Answer Incorrect Answer
    C gamma particle Correct Answer Incorrect Answer
    D all of the three Correct Answer Incorrect Answer

    Solution

    Radioactive substances are continually producing three kinds of dangerous radiation: alpha particles, beta particles and gamma rays. These types of radiation are invisible to the naked eye, and so you won't see a green glow.

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