Chemistry
9
specification units
31
named subtopics
Year 12
year groups
Pearson Edexcel International AS Level Chemistry is organised here into 9 specification units covering 31 named subtopics, studied across Year 12. The units are Formulae, Equations and Amounts of Substance, Atomic Structure and the Periodic Table, Bonding and Structure, Introductory Organic Chemistry, Energetics I, Inorganic Chemistry and the Periodic Table, Kinetics and Equilibria I, Organic Chemistry I and Practical Skills in Chemistry I.
Each subtopic is tagged on the question bank, so you can practise one skill at a time, sit a full Edexcel IAS past paper, or build a mixed worksheet from several units at once. Answers are checked against the Pearson Edexcel International AS Level mark scheme, awarding method, accuracy and final-answer marks separately so you can see exactly where marks were lost.
Bonding and Structure is the widest unit on this specification with 5 subtopics, so it is usually the highest-value place to start revision.
Formulae, Equations and Amounts of Substance
- Atomic structure and mass spectrometry
- The mole and Avogadro constant
- Empirical and molecular formulae
- Reacting masses and gas volumes
Atomic Structure and the Periodic Table
- Electronic configuration and orbitals
- Ionisation energies
- Periodicity
Bonding and Structure
- Ionic bonding and lattices
- Covalent and dative bonding
- Metallic bonding
- Shapes of molecules and electronegativity
- Intermolecular forces
Introductory Organic Chemistry
- Nomenclature and isomerism
- Alkanes and free-radical substitution
- Alkenes and addition reactions
Energetics I
- Enthalpy changes and calorimetry
- Hess's law and enthalpy cycles
- Bond enthalpies
Inorganic Chemistry and the Periodic Table
- Group 2 elements and compounds
- Group 7 halogens and reactions
- Tests for ions
Kinetics and Equilibria I
- Collision theory and rates
- Catalysts
- Dynamic equilibrium and Le Chatelier
Organic Chemistry I
- Halogenoalkanes and substitution
- Alcohols and oxidation
- Mass spectrometry and IR spectroscopy
Practical Skills in Chemistry I
- Planning and experimental design
- Measurement and data recording
- Titration and volumetric analysis
- Analysis and evaluation
How to revise Edexcel IAS Chemistry
- 1
Diagnose with one mixed set
Start with a mixed set drawn from all 9 units to find where Chemistry marks are actually being lost, rather than revising what already feels comfortable.
- 2
Drill unit by unit
Work through the subtopics in order, from Formulae, Equations and Amounts of Substance to Practical Skills in Chemistry I, doing short focused sets rather than long unfocused sessions.
- 3
Sit a full past paper under timing
Once two or three units are solid, sit a complete Edexcel IAS Chemistry paper to timing and mark it against the official mark scheme.
- 4
Re-practise only the dropped marks
Convert every dropped mark into a targeted set on that subtopic, then re-test it a week later to check the fix stuck.
Continue with Chemistry
Every board and level we cover for this subject
A Level ChemistrySearchable formula sheet with worked micro-examples
Predicted papersPractice papers built from the topics that recur most
Past paper practiceSit whole papers online with examiner-grade marking
Other specifications for this subject
Chemistry — frequently asked questions
Everything students and parents ask about revising Edexcel IAS Chemistry.
The fastest route is past-paper-first revision: practise exam-style questions by topic, mark every answer against the real Pearson Edexcel International AS Level mark scheme, then drill the topics where you lose marks. On MathsGradeUp you can do all of this for Chemistry in one place — topic practice, full past papers and instant examiner-grade feedback.
Pearson Edexcel International AS Level Chemistry is mapped to the official specification and covers 9 units, including Formulae, Equations and Amounts of Substance, Atomic Structure and the Periodic Table, Bonding and Structure, Introductory Organic Chemistry, Energetics I, Inorganic Chemistry and the Periodic Table and more. Every unit is broken down into subtopics so you can target exactly what you need to revise.
Yes. You can open full Edexcel IAS Chemistry past papers, write directly on them with pen and maths tools, save your work, export a PDF, and submit for examiner-grade marking against the mark scheme.
Yes — our predicted papers for Chemistry are assembled from the topics that recur most in Pearson Edexcel International AS Level exams and the topics you have practised least. They are a revision aid built from the specification, not leaked content.
Each answer is checked against the real Pearson Edexcel International AS Level mark scheme, awarding method, accuracy and final-answer marks the way a real examiner would. You see exactly where marks were earned or dropped, with feedback you can act on.
Chemistry on the Pearson Edexcel International AS Level specification is aimed at Year 12. You can filter practice by year group and topic so the questions always match where you are in the course.
Yes. The Chemistry content follows the current Pearson Edexcel International AS Level specification, including all units and subtopics, so what you practise reflects what you will actually be examined on.
Yes — Chemistry practice, past papers and marking are free during our early launch period. Subscription plans may be introduced later, but launch users get full access now.
You do not just get an answer to copy. Chemistry marking guides you with hints, worked steps and mark-scheme-based feedback so you understand the method and pick up the marks yourself next time. Calculation-style questions are tagged so you can practise both structured and extended-response answers.
Yes. Parents and tutors can see completed Chemistry practice, accuracy, weak topics and overall exam readiness, making it easy to support revision and focus on the right areas.
Short, regular sessions beat occasional long ones. Aim for a few focused Chemistry sessions a week, always finishing by marking your work so each session ends with clear next steps. The progress dashboard shows what to revise next.