The disintegration rate of a radioactive element _______________?
Correct answer: A. Progressively decreases
- A. Progressively decreases
- B. Progressively increases
- C. Remains constant throughout
- D. May increase or decrease depending on the material
Explanation
Radioactive disintegration follows first-order decay, so the activity decreases continuously as fewer undecayed nuclei remain. Its half-life is constant, but its disintegration rate is not.
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