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

2  Nuclear Equations

3  Half-lives and the random nature of radioactive decay

4.3  Hazards and uses of radioactive emissions and of background radiation (physics only)

2  Different half-lives of radioactive isotopes