| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.SL.TZ1.23 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
Nucleus P decays by a sequence of emissions to form nucleus Q. One \(\alpha \) particle and two β− particles are emitted during the sequence. Which statement is correct?
A. Nucleus P has the same number of neutrons as nucleus Q.
B. Nucleus P is an isotope of nucleus Q.
C. Nucleus P has a greater charge than nucleus Q.
D. Nucleus P has fewer protons than nucleus Q.
Markscheme
B
Examiners report
[N/A]
Syllabus sections
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