1. Isotopes and Atomic Structure – Comparison of bromine isotopes in terms of their subatomic particle differences and similarities. 2. Titration Calculations and Hydrated Salts – Determination of the number of water molecules in hydrated sodium carbonate using titration results. 3. Bonding and Molecular Structure – Explanation of bond angles in ammonia and the amide ion based on electron pair repulsion theory. 4. Periodic Trends in Ionization Energy – Analysis of first ionization energy trends in Group 6 elements, including sulfur and phosphorus. 5. Thermal Decomposition of Metal Nitrates – Investigation of the thermal stability of lithium, rubidium, and strontium nitrates and their identification through precipitation reactions. 6. Redox Reactions and Oxidation States – Interpretation of redox behavior in halogen reactions with sulfuric acid, including evidence for hydrogen halide reducing abilities.