recall the differences between contamination and irradiation effects and compare the hazards associated with these two

explain why the hazards associated with radioactive material differ according to the half-life involved

describe the different uses of nuclear radiations for exploration of internal organs, and for control or destruction of unwanted tissue

recall that some nuclei are unstable and may split, and relate such effects to radiation which might emerge, to transfer of energy to other particles and to the possibility of chain reactions

knowledge of the term nuclear fission

for fission to occur the unstable nucleus must usually first absorb a neutron

describe the process of nuclear fusion

knowledge that mass may be converted into the energy of radiation