1. Electron Configuration and Periodic Trends – Identification of the electronic configuration of the arsenide ion and analysis of ionisation energy trends in Group 5 elements. 2. Bonding and Molecular Structure – Explanation of covalent bonding in hydrazine and estimation of bond angles using electron pair repulsion theory. 3. Isotopes and Mass Spectrometry – Calculation of the relative atomic mass of potassium based on isotopic abundance and interpretation of mass spectrometer data. 4. Halogen Reactions and Oxidation States – Analysis of displacement reactions among halogens and redox processes involving hydrogen halides. 5. Thermal Stability of Group 1 and Group 2 Compounds – Explanation of decomposition reactions in nitrates and carbonates and trends in thermal stability. 6. Gas Laws and Chemical Decomposition – Calculation of gas volume from the thermal decomposition of malachite using the ideal gas equation and percentage purity determination of mineral samples.