(a)[1]
State what this suggests about the nuclear structure of every naturally occurring gold atom on Earth.
(b(i))[2]
Determine how many protons and how many neutrons are present in the nucleus of this isotope of mercury.
(b(ii))[1]
Using Fig. 9.1, determine the background count rate measured in the research laboratory.
(b(iii))[4]
Using Fig. 9.1, determine the half-life of gold-198 from the decay graph.