| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.SL.TZ2.22 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 22 | Adapted from | N/A |
Question
What is the relationship between nucleon number A, proton number Z and neutron number N?
A. A=Z=N
B. A+Z=N
C. A−Z=N
D. Z−A=N
Markscheme
C
Examiners report
[N/A]
Syllabus sections
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