A radioactive sample with a half-life of 1 month, has an activity 2μ Ci. Its activity 2 months earlier was:
Correct answer: D. 8μ Ci
- A. 1μ Ci
- B. 0.5μ Ci
- C. 4μ Ci
- D. 8μ Ci
Explanation
After first half-life, the activity would become 4 μ Ci.After second half-life, the activity would become 2 μ Ci.So, initially it had an activity of 8 μ Ci.
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