The decay rate of radioactive substance is:
Correct answer: C. Decreases exponentially with time
- A. Constant with time
- B. Varies inversely with time
- C. Decreases exponentially with time
- D. Decreases linearly with time
Explanation
The correct statement is C. Decreases exponentially with time. The decay rate of a radioactive substance decreases exponentially as the radioactive nuclei decay over time.
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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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