The radius of a nucleus of the helium nuclide 24He^{4}_{2}\text{He}24He is approximately 1.90×10−15 m1.90 \times 10^{-15} \text{ m}1.90×10−15 m.
What is the approximate radius of a nucleus of the lead nuclide 82208Pb^{208}_{82}\text{Pb}82208Pb?
3.80×10−15 m3.80 \times 10^{-15} \text{ m}3.80×10−15 m
7.09×10−15 m7.09 \times 10^{-15} \text{ m}7.09×10−15 m
13.7×10−15 m13.7 \times 10^{-15} \text{ m}13.7×10−15 m
98.8×10−15 m98.8 \times 10^{-15} \text{ m}98.8×10−15 m
128 exam-style questions on AQA A Level Physics Radioactivity (A-level only), covering Rutherford scattering (A-level only), $\alpha$ , $\beta$ and $\gamma$ radiation (A-level only), Radioactive decay (A-level only), Nuclear instability (A-level only), Nuclear radius (A-level only), Mass and energy (A-level only), Induced fission (A-level only), and Safety aspects (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.