| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.sl.TZ2.6 |
| Level | SL | Paper | 1 | Time zone | TZ2 |
| Command term | Deduce | Question number | 6 | Adapted from | N/A |
Question
What is the relative atomic mass of an element with the following mass spectrum?
A. 24
B. 25
C. 26
D. 27
Markscheme
A
Examiners report
There were G2 comments about the mathematical ability required for this question and the format of the graph. The high difficulty index of 80% and satisfactory discrimination index of 0.42 would however indicate that it was accessible to candidates.
Syllabus sections
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