| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.sl.TZ1.6 |
| Level | SL | Paper | 1 | Time zone | TZ1 |
| Command term | Identify | Question number | 6 | Adapted from | N/A |
Question
Which statement about the numbers of protons, electrons and neutrons in an atom is always correct?
A. The number of neutrons minus the number of electrons is zero.
B. The number of protons plus the number of neutrons equals the number of electrons.
C. The number of protons equals the number of electrons.
D. The number of neutrons equals the number of protons.
Markscheme
C
Examiners report
One respondent suggested that neutral should have been inserted into the question for clarification purposes. However, neutrality is implied by the term atom in the question itself.
Syllabus sections
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