1. Calculation of Ions in Aluminium Oxide – Determination of the number of ions in 306 g of Al₂O₃ using Avogadro’s constant. 2. Electronic Configuration of Sulfide Ion – Selection of the correct electronic configuration for S²⁻ from multiple-choice options. 3. Isotopes and Mass Spectrometry – Calculation of the mass number of an unknown isotope given the relative atomic mass of gallium. 4. Group 2 Trends in the Periodic Table – Analysis of trends in thermal stability and solubility of carbonates, nitrates, hydroxides, and sulfates. 5. Iron(II) Compounds and Chemical Testing – Determination of the percentage of iron in FeSO₄ and qualitative tests for sulfate ions. 6. Flame Tests and Identification of Ions – Explanation of how to conduct a flame test, the origin of flame colors, and why magnesium ions do not produce a color.