| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.SL.TZ1.23 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
A sample contains an amount of radioactive material with a half-life of 3.5 days. After 2 weeks the fraction of the radioactive material remaining is
A. 94 %.
B. 25 %.
C. 6 %.
D. 0 %.
Markscheme
C
Examiners report
[N/A]
Syllabus sections
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