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