Ionization smoke detectors use a small amount of radioactive material, americium-241, to detect smoke.
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Tritium is a naturally-occurring radioactive isotope of hydrogen that is often used to light up a sign without batteries or electricity
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Discover how iodine-131 is used as a medical tracer and where to learn more
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When radium was discovered in the early 1900s, people were fascinated by its mysterious glow and it was added to many everyday products, including paints
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Radon is a natural, radioactive gas that you can't see or smell
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Uranium is a naturally-occurring radioactive element that is primarily used as fuel for nuclear reactors that make electricity
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