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Modern smoke detectors utilize a small sample of americium-241 as a source of ionizing radiation. 241Am has a half-life of 432.2 years. The National Fire Protection Agency recommends replacing smoke detectors every 10 years. (a) How much 241Am remains after 10.0 years if a particular smoke detector contains 0.23 µg of 241Am at the time of construction?
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Modern smoke detectors utilize a small sample of americium-241 as a source of ionizing radiation. 24...
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