| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ2.24 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
A detector, placed close to a radioactive source, detects an activity of 260 Bq. The average background activity at this location is 20 Bq. The radioactive nuclide has a half-life of 9 hours.
What activity is detected after 36 hours?
A. 15 Bq
B. 16 Bq
C. 20 Bq
D. 35 Bq
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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