Chemistry past papers › 9701/21/O/N/25

9701/21/O/N/25 Question 2

Chemistry October/November 2025 Paper 21 · 11 marks · Period 3 physical properties, Particles in the atom and atomic radius, Oxidation numbers of oxides and chlorides, Explaining Period 3 trends, Period 3 oxides and hydroxides, Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds, Thermal decomposition

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