The exam assesses advanced chemistry concepts, focusing on atomic structure, periodic trends, bonding, reaction energy, and electrolysis. Key topics include Mendeleev’s periodic table, isotopes, endothermic and exothermic reactions, ammonia synthesis, and hydrogen fuel cells. Practical applications involve calculating bond energies, analyzing reaction rates, interpreting titration data, and determining yields and concentrations. Questions emphasize the environmental impact of chemical processes, evaluating material properties, and sustainability in industrial applications. Keywords: GCSE Chemistry, periodic trends, atomic structure, bonding, reaction energy, electrolysis, isotopes, fuel cells, sustainability, chemical processes.