| Date | November 2009 | Marks available | 1 | Reference code | 09N.1.SL.TZ0.24 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
A radio-isotope has an activity of 400 Bq and a half-life of 8 days. After 32 days the activity of the sample is
A. 200 Bq.
B. 100 Bq.
C. 50 Bq.
D. 25 Bq.
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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