Sodium-24 (1124Na^{24}_{11}\text{Na}1124Na) is an isotope of sodium.
Which of the isotopes given in Table 1 is not an isotope of sodium? Give a reason for your answer.
Table 1
| Isotope | Mass number | Atomic number |
|---|---|---|
| A | 23 | 11 |
| B | 24 | 12 |
| C | 22 | 11 |
How many hours does it take for the number of sodium-24 nuclei to decrease from 10 000 to 5000?
What is the half-life of sodium-24?
Atoms and nuclear radiation Questions
Practise AQA GCSE Physics Atoms and nuclear radiation with exam-style questions for Foundation and Higher tier. 21 questions covering Radioactive decay and nuclear radiation, Nuclear equations, Half-lives and the random nature of radioactive decay, and Radioactive contamination, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.