(a)[2]
Describe what the term radioactive means.
(b(i))[1]
Use the information in Fig. 12.1 to fill in the table. The first entry has already been completed for you.
(b(ii))[1]
Find the half-life of carbon-14.
(c)[2]
Calculate the mass of iodine isotope left in the sample after 16 days.
(d)[1]
State one safety precaution used by people who work with radioactive sources.