Unit 4 - Atomic structure
4.1 Atoms and isotopes
1 The structure of an atom
2 Mass number, atomic number and isotopes
3 The development of the model of the atom
4.2 Atoms and nuclear radiation
1 Radioactive decay and nuclear radiation
2 Nuclear Equations
3 Half-lives and the random nature of radioactive decay
4 Radioactive contamination
4.3 Hazards and uses of radioactive emissions and of background radiation (physics only)
1 Background radiation
2 Different half-lives of radioactive isotopes
3 Uses of nuclear radiation
4.4 Nuclear fission and fusion (physics only)
1 Nuclear fission
2 Nuclear fusion
