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Iodine-129 is an isotope found in radioactive waste from nuclear power stations. Iodine-129 has a half-life of approximately 15 million years. A sample of

Iodine-129 is an isotope found in radioactive waste from nuclear power stations. Iodine-129 has a half-life

Iodine-129 is an isotope found in radioactive waste from nuclear power stations. Iodine-129 has a half-life of approximately 15 million years. A sample of iodine-129 has an activity of 72 kBq. Show that the time required for the sample to have an activity less than 5 kBq is approximately 60 million years.

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