Sodium-24 (1124Na^{24}_{11}\text{Na}1124Na) is a radioactive isotope that decays by emitting beta-minus (β−\beta^-β−) radiation.
Which of the following is the correct decay equation for Sodium-24?
- A: 1124Na→0920F+24He^{24}_{11}\text{Na} \rightarrow {}^{20}_{\phantom{0}9}\text{F} + {}^{4}_{2}\text{He}1124Na→0920F+24He
- B: 1124Na→1024Ne+−1−0e^{24}_{11}\text{Na} \rightarrow {}^{24}_{10}\text{Ne} + {}^{\phantom{-}0}_{-1}\text{e}1124Na→1024Ne+−1−0e
- C: 1124Na→1224Mg+−1−0e^{24}_{11}\text{Na} \rightarrow {}^{24}_{12}\text{Mg} + {}^{\phantom{-}0}_{-1}\text{e}1124Na→1224Mg+−1−0e
Use the graph above to determine the change in mass of the sample of Sodium-24 between 5 hours and 25 hours.
Use the graph above to estimate the mass of Sodium-24 remaining after 35 hours.
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.