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.