The half life of a radioactive sample predicts about
Correct answer: B. Disintegration time for half of the atoms
- A. Whole life of sample
- B. Disintegration time for half of the atoms
- C. Decay only
- D. Total time for stable atoms
Explanation
The radioactive half-life for a given radioisotope is the time for half the radioactive nuclei in any sample to undergo radioactive decay. After two half-lives, there will be one fourth the original sample, after three half-lives one eight the original sample, and so forth.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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