| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.28 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 28 | Adapted from | N/A |
Question
The decay constant of a radioactive isotope with half-life T is defined as
A. Tln2.
B. the rate of decay of one nucleus of the isotope per second.
C. Tln2.
D. the probability of decay of one nucleus of the isotope per unit of time.
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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