Carbon-14 has a half-life of 5700 years. At the end of 11400 years, the actual amount left is:
Correct answer: C. 0.25 of original amount
- A. 0.0625 of original amount
- B. 0.5 of original amount
- C. 0.25 of original amount
- D. 0.125 of original amount
Explanation
Option C is correct since in 11400 yearstwo half-lives must have passed. Therefore, in the first half-life, the amount of C-14 will reduce from 1 to 0.5. And in the second half-life, 'T' will reduce from 0.5 to 0.25. Option A is incorrect since it indicates 4 half-lives.Option B is incorrect since it indicates only 1 half-life.Option D is incorrect since it indicates only 3 half-lives.
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