(a(i))[2]
Describe the arrangement and composition of a neutral phosphorus-31 atom.
(a(ii))[1]
State how an atom of phosphorus-32 is different from an atom of phosphorus-31.
(b(i))[1]
State how a nucleus of this sulfur isotope differs from a nucleus of phosphorus-32.
(b(ii))[3]
On Fig. 6.1, plot a graph showing how the total number of sulfur atoms in the sample varies with $t$, then draw a suitable curve.
(c)[2]
State two precautions used when storing or transporting radioactive materials.