(a)[4]
Use the readings to estimate the background count rate during the test, and then find the sample half-life.
(b)[3]
Complete the nuclide equation so this decay is shown.
(c)[3]
On Fig. 11.1, finish the paths of the three $\alpha$-particles.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
A radiation detector is used to monitor a radioactive source for several hours. The results are listed in Table 11.1.