The table shows the composition of three different nuclei.
| Nucleus | Number of protons | Number of neutrons |
|---|---|---|
| P | 8 | 8 |
| Q | 8 | 10 |
| R | 10 | 8 |
Which nuclei are isotopes of the same element?
P, Q and R
P and Q only
P and R only
Q and R only
170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.