The core physical foundations and main group inorganic chemistry for OxfordAQA International AS Chemistry (Specification 9620). Complete unit study notes, examiner differentiators, and assessment guidance.
Unit 1 (CH01) tests fundamental physical and inorganic principles that underpin all higher-level chemical reasoning. Questions assess theoretical understanding, mathematical problem-solving, and practical laboratory techniques tested in written context.
Unit CH01 is examined in both the January series and the May/June series. Candidates can sit CH01 in January of Year 12 as an early benchmark, with the full freedom to resit in May/June to bank the highest score.
Marks achieved in CH01 can be cashed in alongside CH02 for the standalone International AS award (code 9621), or carried forward indefinitely towards the full International A-Level award (code 9622).
Select any module below to access comprehensive revision notes, mathematical derivations, worked examples, and interactive practice questions:
The mathematical foundation linking moles, ideal gas behavior, solution concentrations, percentage yield, and green atom economy across AS, A2, and Paper 5.
Open Topic Notes →Subatomic particles, TOF mass spectrometry stages (EI vs ESI, drift tube math, detection), electron configurations (Cr and Cu anomalies), and ionisation energy trends.
Open Topic Notes →Avogadro constant, standard solution preparation, precise titration protocols, concordant titres, back titrations, and net ionic equations with state symbols.
Open Topic Notes →Ionic, covalent, coordinate (dative), and metallic bonding; electronegativity and intermolecular forces (hydrogen bonding in ice and water); VSEPR shapes and angles.
Open Topic Notes →Period 3 element trends from Na to Ar, nuclear charge vs shielding, atomic radius contraction, first ionisation energy pattern, and structural melting point variations.
Open Topic Notes →Reactivity with water and steam, opposing hydroxide and sulfate solubility trends, medical applications (barium meal, antacids), titanium extraction, and flue gas desulfurisation.
Open Topic Notes →Electronegativity and boiling point trends, redox displacement reactions, solid halide reactions with concentrated sulfuric acid, silver nitrate tests with ammonia, and chlorine disproportionation.
Open Topic Notes →Complete 70-mark mock paper with Section A interactive MCQs and Section B structured written questions, detailed M1-M4 mark schemes, and printable worksheet mode.
Launch Practice Exam (70 Marks) →