The half-life of a radioactive element is:
Correct answer: D. Inversely proportional to decay constant
- A. Inversely proportional to square of decay constant
- B. Directly proportional to square of decay constant
- C. Directly proportional to decay constant
- D. Inversely proportional to decay constant
Explanation
Formula for half life is T= 0.693/λ, so half life in inversely proportional to decay constant.
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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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