| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ2.25 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 25 | Adapted from | N/A |
Question
The half-life of a particular radioactive isotope is 8 days. The initial activity of a pure sample of the isotope is A.
Which of the following is the time taken for the activity of the isotope to change by \(\frac{7}{8}\)A?
A. 7 days
B. 24 days
C. 32 days
D. 56 days
Markscheme
B
Examiners report
Syllabus sections
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