Cambridge IGCSE Chemistry: Syllabus, Papers & Resources

Chemistry is a subject where small mistakes cost real marks. Miss a state symbol, and you lose the mark. Do a mole calculation in the wrong order, and the answer falls apart. Give a vague reason, and the marks slip away. For many students, the subject feels wide and hard to predict.

This guide makes it clearer. You will learn what the course covers, how the papers work, how grading works, and where to find the resources worth your time. At Ignite Training Institute, we teach 0620 every term, so this advice comes from real lessons. Once you know how the course is built, revision gets easier.

What Is Cambridge IGCSE Chemistry (0620)?

Cambridge IGCSE Chemistry is an international science qualification from Cambridge Assessment International Education. It has two codes: 0620, graded A* to G, and 0971, graded 9 to 1. The content and papers are the same. Students follow either Core or Extended work and sit three papers at the end.

Here are the basics before we look at each part:

Aspect	Cambridge IGCSE Chemistry
Awarding body	Cambridge Assessment International Education (CAIE)
Subject codes	0620 (A* to G) and 0971 (9 to 1)
Current syllabus	2026 to 2028 (content unchanged from 2023 to 2025)
Routes	Core or Extended
Papers sat	Three (multiple choice, theory, practical)
Practical option	Paper 5 (Practical Test) or Paper 6 (Alternative to Practical)
Exam series	June and November (March in India)
Grading	A* to G (0620) or 9 to 1 (0971)
Progression	A-Level, IB, and science degrees

The two codes confuse many families, so here is the simple version. 0620 and 0971 are the same subject. They share the same syllabus, papers, and mark schemes. The only difference is the grade label on the certificate. 0620 uses A* to G. 0971 uses 9 to 1. Your school picks the code.

Chemistry sits inside the British system. It is a common choice at schools that follow the Cambridge curriculum and other British curriculum paths across the UAE. It also leads straight into A-Level science. For students who want to study medicine, pharmacy, or engineering, it is close to essential.

The 2026 To 2028 Syllabus At A Glance

Worried your notes are out of date? You can relax. The current version is the 2026 to 2028 syllabus. Cambridge says it has no major content changes from the 2023 to 2025 version.

Some learning aims were reworded to be clearer. The split between Core and Supplement was reviewed. But the chemistry you learn is the same. Textbooks made for the 2023 syllabus still work, and past papers from 2023 onward still match. You can find the full detail on the official Cambridge IGCSE Chemistry (0620) page.

Core Vs Extended: Which Route Fits You

Cambridge splits the course into two routes. Core covers the basics and leads to grades C to G. Extended covers the Core work plus extra Supplement material, and it opens up the full A* to G range.

You cannot mix them. Your teacher or exams officer usually picks the route for the class. As a rule, students aiming for A-Level science or medicine should take Extended. Core stops at a grade C, and that is below what most sixth forms ask for.

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How Is Cambridge IGCSE Chemistry Assessed?

Every student sits three papers. One is multiple choice. One is theory. One is practical. The multiple choice and theory papers depend on your route. For the practical, you sit one of two options.

Here is how the six papers work:

Paper	Who Sits It	Format	Marks	Weighting
Paper 1	Core	Multiple choice	40	30%
Paper 2	Extended	Multiple choice	40	30%
Paper 3	Core	Theory (structured)	80	50%
Paper 4	Extended	Theory (structured)	80	50%
Paper 5	Both routes	Practical Test	40	20%
Paper 6	Both routes	Alternative to Practical	40	20%

So a Core student sits Papers 1, 3, and either 5 or 6. An Extended student sits Papers 2, 4, and either 5 or 6. The multiple choice paper lasts 45 minutes. The theory paper lasts 1 hour 15 minutes.

One useful point for planning: you can use a calculator in every paper. That does not make the calculation questions easy. You still earn marks for the method, the units, and the significant figures, not just the final number.

The Six Papers Explained

The multiple choice paper tests quick, accurate recall across the whole syllabus. The theory paper decides most of your grade. It asks you to describe, explain, calculate, and use ideas in new situations.

The theory paper also holds the longer, higher mark questions. These often cover stoichiometry, electrolysis, and organic chemistry. They are the questions that separate a middle grade from a top one, so they need the most practice.

How Practical Skills Are Tested (Paper 5 Vs Paper 6)

Both routes include a practical part, and you sit only one option. Paper 5 is a hands-on Practical Test in a lab. Paper 6 is the Alternative to Practical. It is a written paper that tests the same skills without lab work.

Either way, you are marked on real lab skills. That means taking readings, handling data, spotting errors, and drawing sound conclusions. For qualitative analysis, Cambridge now gives you the “Notes for use in qualitative analysis” in Paper 6, so the ion and gas tests are provided, not memorised. From March 2026, Cambridge is also changing the layout of the papers to make them easier to read. The content and the difficulty stay the same. The current specimen and past papers, linked in the resources section below, show what each format looks like.

Know More About: IGCSE Exam Dates 2026: Cambridge, Edexcel, And Oxford AQA

What Topics Does The Syllabus Cover?

The syllabus has twelve topics. They build on each other, so gaps in the early ones cause problems later. Extended students study everything a Core student does, plus the extra Supplement content inside each topic.

Here are the twelve topics, what each one covers, and where the Extended route adds Supplement depth:

Topic	What It Covers	Supplement Focus
1. States of Matter	Kinetic particle theory; solids, liquids and gases; changes of state and diffusion	Mostly Core
2. Atoms, Elements and Compounds	Atomic structure, isotopes and electronic configuration; ionic, covalent and metallic bonding	Bonding and structure detail
3. Stoichiometry	Formulae, balanced equations and the mole concept; reacting masses and concentration	Mole and formula calculations
4. Electrochemistry	Electrolysis of molten and aqueous substances; electrode products; hydrogen fuel cells	Ionic half-equations and predicting products
5. Chemical Energetics	Exothermic and endothermic reactions; reaction energy level diagrams	Energy change from bond energies
6. Chemical Reactions	Rate of reaction; reversible reactions and equilibrium; redox	Le Chatelier’s principle and redox as electron transfer
7. Acids, Bases and Salts	Acid and base properties; the pH scale; salt preparation and titrations	Deeper salt preparation and analysis
8. The Periodic Table	Group I, Group VII and the noble gases; periodic trends; transition elements	Explaining trends and transition element properties
9. Metals	Reactivity series and reactions; extraction of metals; alloys and corrosion	Extraction detail and reactivity explanations
10. Chemistry of the Environment	Water and its tests; air quality and climate; fertilisers	Mostly Core
11. Organic Chemistry	Fuels and homologous series; alkanes, alkenes, alcohols and carboxylic acids; polymers	Isomerism, further reactions and condensation polymers
12. Experimental Techniques and Chemical Analysis	Measurement; purification and separation; chromatography; identifying ions and gases	Interpreting and evaluating results

It helps to read this list by weight. Stoichiometry, Acids, Bases and Salts, and Organic Chemistry usually carry the most marks in the theory paper. So they deserve early and regular practice, not a quick skim at the end.

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How Hard Is Cambridge IGCSE Chemistry?

Chemistry is fair, but it asks a lot. It needs two skills at once. You have to understand ideas like bonding and structure. You also have to handle numbers, like mole calculations. Students who are good at one but weak at the other tend to get stuck.

Here is the good news. About half of the marks come from knowledge and understanding. So steady recall of definitions, tests, and equations builds a strong base before you reach the harder questions.

The Concepts Students Find Toughest

After years of teaching this subject, the same tricky spots come up again and again. Cambridge’s own grade descriptions show the pattern. The step from a grade C to a grade A sits mostly in the topics below.

• Mole and empirical formula calculations: One small setup mistake can cost the whole answer.
• Electrolysis and ionic half-equations: You need the chemistry and the charge balance to be right.
• Equilibrium and Le Chatelier’s principle: You have to apply it to reactions you have not seen before.
• Organic reaction pathways and esterification: The conditions and products have to be exact.
• Energy changes from bond energies: The signs and the arithmetic trip people up.

None of this is out of reach for a well prepared student. It just needs steady, spaced practice, not one read through the textbook.

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How Is Cambridge IGCSE Chemistry Graded?

Grading depends on the code. 0620 uses the A* to G scale. 0971 uses the 9 to 1 scale. Both use the same papers and mark schemes. Core students can get grades C to G. Extended students can reach the full range, up to A*.

Many UAE sixth forms and universities ask for at least a grade C, or a 4 on the number scale. So it helps to know where your target sits. Here is how the two scales line up:

A*-G Grade (0620)	9-1 Equivalent (0971)	What It Represents
A*	9 or 8	Top grade for the strongest performers; grade 9 sits above the old A*
A	7	Excellent performance; official anchor point where 7 aligns with A
B	6	Strong result
C	5 or 4	Standard pass; official anchor point where 4 aligns with C
D	3	Below a standard pass
E	2	Below a standard pass
F	1	Below a standard pass
G	1	Lowest classified grade; official anchor point where 1 aligns with G
U	U	Ungraded, no qualification awarded

Only three points are fixed between the two scales. Grade 7 matches A. Grade 4 matches C. Grade 1 matches G. The grades in between are a close guide, not an exact swap. The number scale was built to give more room at the top, so it can separate the very best students.

A*-G Vs 9-1 & Where Core Caps Out

The most important planning point is the Core ceiling. Core papers only go up to a set level of difficulty. So the best a Core student can get is a grade C. That is why students who want a science career usually take Extended.

There is also an admin point worth knowing. Once a school enters a student on the A* to G scale, it cannot move to 9 to 1 after the entry deadline. So the Cambridge IGCSE grading choice is fixed at entry.

One more point clears up a lot of confusion. Grade descriptions are not grade boundaries. Cambridge uses grade descriptions to show what a typical A, C, or F student can do. They do not set the pass mark. The boundaries are set at the end of each series. They depend on how hard that paper turned out to be. So the raw mark you need for a grade changes a little each time.

Know More About: IGCSE Grades Explained: Grading System, Pass Marks 2026

Best Resources: Coursebook & Past Papers

You do not need a pile of books for this subject. You need one good coursebook and a clear way to work through past papers. Here is how to get the most from both.

Using The Cambridge IGCSE Chemistry Coursebook (And Its Answers)

The most common choice is the endorsed Cambridge IGCSE Chemistry Coursebook from Cambridge University Press, by Richard Harwood and Ian Lodge. It follows the syllabus and has exam-style questions at the end of each chapter. That is where its real value sits.

Many students search for the coursebook answers, so here is the honest answer. The official answers to the coursebook questions come from Cambridge University Press, through the Cambridge GO platform at cambridge.org/go, not on random file-sharing sites. Use the answers to check your work after you try a question, not to copy. Pair the coursebook with real past papers too, because the questions in the book can fall behind the current style.

How To Use Cambridge IGCSE Chemistry Past Papers Effectively

Nothing improves your exam performance faster than past papers. The best source is the official Cambridge IGCSE Chemistry past papers page. It also holds mark schemes, examiner reports, and specimen papers. The free set is small and can be older than the current syllabus, so use papers from 2023 onward and check them against today’s content.

Work through them in steps, not at random. Start with topic-by-topic questions to lock in each topic. Then move to full timed papers to build stamina. Then mark your own work against the official scheme to see where you lose marks.

Two habits raise grades faster than students expect. First, read the Principal Examiner report after you mark your paper. It names the exact mistakes students make, from vague answers to missing state symbols. Second, use specimen papers to learn the current question style, and keep the March 2026 layout change in mind. Stick to official or school access, and avoid pirated sites, which are often wrong or incomplete.

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How To Revise & Aim For An A* In IGCSE Chemistry

A top grade is rarely about talent alone. It comes from a routine that matches the exam and gives the hard topics enough time. The two habits below, steady revision and clean exam technique, make most of the difference.

A Term-By-Term Revision Approach

Spread the work across the year. Do not save it for the final weeks. A routine built on a few simple habits keeps the hard topics from piling up:

• Build the base first: Early on, focus on understanding each topic. Write clean notes on definitions, equations, and reaction conditions.
• Test as you go: When you finish a topic, try topical questions before you move on. Gaps then show up early, not in the mock.
• Move to full papers: In the last stretch, switch to full timed papers to build speed and stamina.
• Mark against the scheme: Grade your own answers with the official mark scheme. You will see exactly where marks are won and lost.
• Keep it steady: Aim for two short chemistry sessions a week, one slot to review mistakes, and a timed paper every week or two.

A steady weekly rhythm like this, kept up all year, is what makes revision stick. It beats any last-minute rush.

Exam Technique That Protects Marks

Many students know chemistry but still lose marks on how they answer. A few simple habits protect the marks you have earned:

• Show every step:  Write out each stage of a calculation. Then method marks are safe even if the final number is wrong.
• Mind units and figures: Give the right units and significant figures. Add state symbols when the question asks for them.
• Name chemicals exactly: Examiners want the exact word, so “ammonia” and “ammonium” are not the same.
• Read the command word: Learn what each word wants, since “describe”, “explain”, and “suggest” each need a different kind of answer.

Cambridge’s guide to understanding command words is a short, useful read before your mocks.

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Ignite: Cambridge IGCSE Chemistry Tutors In Dubai

Most students do not struggle with chemistry itself. They struggle with what the exam asks. That means calculation questions under time pressure, the exact words examiners want, and topics that pile up when left alone. Good tutoring closes that gap.

Lessons at Ignite are built around the real 0620 papers, so students practise the exact question types they will face, with feedback tied to the mark scheme. Our Chemistry tutors in Dubai focus on the places where grades are won, from stoichiometry and electrolysis to practical analysis and command words. 

One student we helped, Palanivel, went on to earn A* grades across the sciences, including Chemistry, at IGCSE and A-Level. That came from steady, targeted practice, not last-minute effort. For families who want help across more subjects, our IGCSE tutors in Dubai cover Chemistry alongside the rest.

FAQs

1. How Many Papers Are There In Cambridge IGCSE Chemistry?

Every student sits three papers: one multiple choice, one theory, and one practical. Core students take Papers 1 and 3. Extended students take Papers 2 and 4. Both routes then take either Paper 5 (Practical Test) or Paper 6 (Alternative to Practical). The school decides which practical paper you sit.

2. What Is The Difference Between 0620 And 0971?

They are the same subject with different grades. 0620 uses the A* to G scale. 0971 uses the 9 to 1 scale. The syllabus, the papers, and the mark schemes are the same, so your revision does not change. Your school picks the code.

3. Where Can I Find Cambridge IGCSE Chemistry Past Papers?

The official source is the Cambridge past papers page for 0620. It has question papers, mark schemes, examiner reports, and specimen papers. The free set is small, so use recent papers from 2023 onward and check them against the current syllabus. Registered schools can get more through the School Support Hub.

4. Which Coursebook Is Best For Cambridge IGCSE Chemistry?

The endorsed Cambridge University Press coursebook by Richard Harwood and Ian Lodge is the usual choice. It follows the syllabus and has exam-style questions. Some schools also use the Collins IGCSE Chemistry book. Whichever you use, pair it with official past papers, because book questions cannot fully replace real exam practice.

5. What Grade Counts As A Pass In IGCSE Chemistry?

There is no single official pass. But a grade C, or a 4 on the 9 to 1 scale, is widely treated as a standard pass. It is the level many sixth forms and UAE universities want. Students aiming for A-Level science usually need a higher grade, so a B or above is a safer target.

6. Is Cambridge IGCSE Chemistry Hard?

It is challenging but manageable. The hard part is mixing theory with maths, so you need to be comfortable with both. About half the marks reward knowledge and understanding. So a well organised student who does past papers and fixes weak topics early usually copes well.

7. What Is The Hardest Topic In IGCSE Chemistry?

For most students, the hardest areas are stoichiometry and mole calculations, electrolysis, and organic chemistry. They carry heavy marks and need accuracy under pressure. They are also where Cambridge’s grade descriptions place the step from a C to an A, so they are worth putting first in revision.

8. Has The Cambridge IGCSE Chemistry Syllabus Changed For 2026?

The current version is the 2026 to 2028 syllabus. Cambridge says it has no major content changes from the 2023 to 2025 version. Some learning aims were reworded to be clearer, but the chemistry is the same. Textbooks and past papers from 2023 onward still work.

9. What Is The Difference Between Core And Extended Chemistry?

Core covers the basics and leads to grades C to G. Extended covers the Core work plus extra Supplement material and reaches the full A* to G range. You cannot mix them, and the school usually picks the route. Students aiming for top grades or A-Level science should take Extended.

10. Can You Use A Calculator In IGCSE Chemistry?

Yes, you can use a calculator in every Cambridge IGCSE Chemistry paper, including the multiple choice one. That does not make the calculation questions easy. Marks go to the right method, units, and significant figures. Always show your working, because method marks can save an answer even when the final number is wrong.

11. When Are The Cambridge IGCSE Chemistry Exams Held?

Cambridge runs two main series each year, in June and November. There is also a March series in India. Most Dubai schools enter students for June, at the end of Year 11. Check your statement of entry for your exact papers and dates, since the school sets these.

12. Where Can I Find Cambridge IGCSE Chemistry Coursebook Answers?

The official answers to the Cambridge University Press coursebook come through the Cambridge GO platform at cambridge.org/go, linked to your book. Use them to check your work after you try a question, not to copy. Answers on unofficial file-sharing sites are often wrong or incomplete, so be careful with them.

Conclusion

Cambridge IGCSE Chemistry feels much easier once you can see its shape. It is one subject with two codes, a Core or Extended route, three papers, twelve topics, and a grading scale that rewards steady, accurate work. Knowing this early lets you revise with a clear plan instead of guessing.

Use the official syllabus and past papers. Read a few examiner reports. Give the calculation-heavy topics the practice they need. These habits move grades more than any last-minute cramming. If your child wants structured help built around the real 0620 papers, you can book a free demo class with Ignite and see how a clear plan looks for their target grade.