Curium-242 has a half-life of 160 days. What is the decay constant of curium-242 in units of s−1\text{s}^{-1}s−1?
5.0×10−8 s−15.0 \times 10^{-8} \text{ s}^{-1}5.0×10−8 s−1
4.3×10−3 s−14.3 \times 10^{-3} \text{ s}^{-1}4.3×10−3 s−1
7.2×10−8 s−17.2 \times 10^{-8} \text{ s}^{-1}7.2×10−8 s−1
6.1×10−6 s−16.1 \times 10^{-6} \text{ s}^{-1}6.1×10−6 s−1
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.