Moderate
If 10% of a radioactive substance decays in every 5 years, then the percentage of the substance what will decayed in 20 years will be:
Correct answer: A. 40%
- A. 40%
- B. 50%
- C. 65.6%
- D. 34.4%
Explanation
In 5 years radioactive substance decay = 10 %In 20 years radioactive substance decay = 40 %
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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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