One type of smoke alarm/detector must carry a label warning for the presence of a minute amount of a hazardous material. Which kind of hazardous material?

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Multiple Choice

One type of smoke alarm/detector must carry a label warning for the presence of a minute amount of a hazardous material. Which kind of hazardous material?

Explanation:
Some smoke alarms, specifically ionization detectors, use a tiny radioactive source to help sense smoke. Because of that radioactive material, the device must carry a label warning about radioactivity. The hazardous material in question is radioactive, usually a small amount of americium-241. This labeling is a regulatory requirement for devices containing radioactive sources, independent of other substances that might be present. Mercury, asbestos, and lead aren’t the material tied to this particular warning on smoke detectors.

Some smoke alarms, specifically ionization detectors, use a tiny radioactive source to help sense smoke. Because of that radioactive material, the device must carry a label warning about radioactivity. The hazardous material in question is radioactive, usually a small amount of americium-241. This labeling is a regulatory requirement for devices containing radioactive sources, independent of other substances that might be present. Mercury, asbestos, and lead aren’t the material tied to this particular warning on smoke detectors.

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