1. Group 7 Elements and Chemical Reactions – Identification of physical states of halogens at room temperature and explanation of astatine’s predicted state. 2. Electronegativity and Bond Polarity – Analysis of chlorine trifluoride (ClF₃) polarity based on electronegativity differences. 3. Molar Calculations and Avogadro’s Constant – Determination of the number of ions in a given mass of magnesium chloride. 4. Isotopes and Atomic Structure – Identification of errors in a historical model of chlorine isotopes and calculation of relative atomic mass. 5. Ideal Gas Equation in Experimental Chemistry – Calculation of the volume of hydrogen gas produced in a reaction using the ideal gas law. 6. Acid-Base Titrations and Concentration Determination – Calculation of nitric acid concentration from titration results and assessment of its suitability for wood aging.