Subjects
| Sections | |||
|---|---|---|---|
| Radioactive Decay | 42 mins | 0 completed | Learn |
| Band of Stability | 22 mins | 0 completed | Learn |
| Magic Numbers | 10 mins | 0 completed | Learn |
| First Order Half Life | 19 mins | 0 completed | Learn |
| Additional Practice |
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| Alpha Decay |
| Beta Decay |
| Gamma Emission |
| Electron Capture |
| Positron Emission |
| Nuclear Fission |
| Mass Defect |
| Nuclear Fusion |
| Nuclear Transmutation |
Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay of k = 1.6 10–3 yr–1. By contrast, iodine-125, which is used to test for thyroid functioning, has a rate constant for radioactive decay of k = 0.011 day–1.
What is the half-life of iodine-125?
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