Edexcel GCSE Combined Science Paper 3: Chemistry 1 Higher June 2025 examiner report (1SC0/1CH)
Examiner report
- Q1 - 9 marks - Isotopes and relative atomic mass, Subatomic particles, The periodic table
- Q2 - 9 marks - Electrolysis, Making soluble salts, Metallic bonding
- Q3 - 9 marks - Electronic structure, Mixtures and separation techniques, Properties of small molecules, The three states of matter
- Q4 - 9 marks - Amounts of substance in equations, Extraction of metals and reduction, Relative formula mass, Tests for gases
- Q5 - 13 marks - Electrolysis of aqueous solutions, Making soluble salts, Moles and amount of substance, Oxidation and reduction in terms of electrons, Relative formula mass
- Q6 - 11 marks - The pH scale and neutralisation
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