4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes 

4.1.1.1 Atoms, elements and compounds 
4.1.1.2 Mixtures
4.1.1.3 The development of the model of the atom (common content with physics)
4.1.1.4 Relative electrical charges of subatomic particles 
4.1.1.5 Size and mass of atoms
4.1.1.6 Relative atomic mass
4.1.1.7 Electronic structure ​

4.1.2 The periodic table 

4.1.2.1 The periodic table 
4.1.2.2 Development of the periodic table
4.1.2.3 Metals and non-metals
4.1.2.4 Group 0
4.1.2.5 Group 1
4.1.2.6 Group 7

4.1.3 Properties of transition metals (chemistry only) 

4.1.3.1 Comparison with Group 1 elements
4.1.3.2 Typical properties ​