(a)[4]
Complete the table so that it describes the nucleus of astatine-210.
(b(i))[2]
On Fig. 12.1, draw a line to indicate how the count rate varies during the 24 hours.
(b(ii))[3]
Calculate the time required for 0.375 kg of the sample to decay.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
Astatine-210 is a radioactive substance. Its nucleus may be written using the symbol $^{210}_{85}\text{At}$.