1. Electronic Configuration and Ionisation Energy – Identification of the electronic configuration of sulfur ions and trends in the ionisation energy of barium.

2. Flame Tests and Ion Identification – Analysis of errors in flame test descriptions and selection of appropriate materials for conducting flame tests.

3. Mass Spectrometry and Isotopic Abundance – Calculation of the relative peak height of chlorine isotopes and interpretation of mass spectrum peaks.

4. Intermolecular Forces and Solubility – Explanation of why methanol is highly soluble in water while sodium chloride is less soluble.

5. Structure and Bonding of Substances – Comparison of melting points in covalent and ionic compounds based on bonding and structure.

6. Chemical Reactions of Chlorine – Explanation of disproportionation reactions and calculation of atom economy for chlorine compounds.