An unidentified parent nucleus undergoes beta-minus decay. The daughter nucleus contains 16 protons and 16 neutrons.
The table shows four possible compositions for the parent nucleus.
| nucleus | number of protons | number of neutrons |
|---|---|---|
| P | 15 | 17 |
| Q | 16 | 16 |
| R | 17 | 15 |
| S | 15 | 16 |
Which nucleus in the table was the parent nucleus?
nucleus P
nucleus R
nucleus Q
nucleus S
120 exam-style questions on Edexcel GCSE Physics 6.3 Nuclear equations and decay, covering 6.3.1 Beta-minus and beta-plus decay, 6.3.2 Effects of decay on the nucleus, and 6.3.3 Balancing nuclear equations. Each one has a worked solution and a mark scheme showing where the marks go.