1. Electronic Configuration and Ionic Structures – Determination of the electronic structure of sulfide ions and calculation of ion counts in aluminium oxide. 2. Isotopes and Relative Atomic Mass Calculations – Explanation of isotopic differences and determination of unknown isotope mass using given abundance data. 3. Group 2 Element Trends – Analysis of thermal stability variations in Group 2 carbonates and nitrates, and solubility trends of hydroxides and sulfates. 4. Chemical Testing and Compound Identification – Description of flame tests for metal ions, sulfate ion detection in iron(II) sulfate, and precipitate formation in magnesium bromide solutions. 5. Reactivity and Gas Collection in Reactions – Calculation of reactant excess, gas volume prediction using the ideal gas law, and improvements to experimental accuracy. 6. Structure and Bonding in Carbon Allotropes – Comparison of electrical conductivity in graphene, graphite, and diamond based on their bonding and electron delocalization.