Uploaded April 2019 | Updated September 2026, 14 hours ago

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This video goes over three worked examples using the radioactive decay law. The radioactive decay law states that the number of parent nuclei in a radioactive sample decreases exponentially over time. Includes a full explanation and a worked example for calculating the number of radioactive nuclei that remain after a specific amount of time. Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation in the form of alpha, beta and gamma particles.

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