Find the probability that the nucleus of 87Ra 221 undergoes decay after three half-lives if it's a radioactive substance with a half-life of 6 days.
Correct answer: C. 5/6
- A. 1/6
- B. 3/2
- C. 5/6
- D. 1/2
Explanation
Correct Option: C This option is correct because after one half-life. N°/2 sample remains and N/2 decays After three half-lives, N°/6 remains and 5N/6 decays. Hence the probability is ⅚
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