When a student says “I understand chemistry in class but I can’t do the questions”, the gap is usually two things: the maths, and the symbols. Both are a fixed, finite list, and both respond to retrieval practice. This guide covers the paper split, what the exam gives you, the maths, the equations, the required practicals and a weekly plan, using the method in the revision hub.
What is in GCSE chemistry paper 1 and paper 2?
GCSE chemistry paper 1 covers atomic structure, bonding, quantitative chemistry, chemical changes and energy changes; paper 2 covers rates, organic chemistry, analysis, the atmosphere and resources. On AQA, paper 2 can also draw on the first three paper 1 topics, so nothing in paper 1 can be dropped after the first exam.
AQA’s GCSE Chemistry specification sets paper 1 as topics 1 to 5 and paper 2 as topics 6 to 10, each paper 1 hour 45 minutes and 100 marks, and states that “questions in Paper 2 may draw on fundamental concepts and principles from sections 4.1 to 4.3”, which are atomic structure, bonding and quantitative chemistry. Trilogy students sit the same ten topic headings, numbered 8 to 17, in two 1 hour 15 minute, 70-mark papers with some content removed. Other boards split the content differently, so check the board before using any topic list.
| AQA GCSE Chemistry | Topics | Length | Marks |
|---|---|---|---|
| Paper 1 | Atomic structure and the periodic table; Bonding, structure and the properties of matter; Quantitative chemistry; Chemical changes; Energy changes | 1 h 45 min | 100 |
| Paper 2 | The rate and extent of chemical change; Organic chemistry; Chemical analysis; Chemistry of the atmosphere; Using resources | 1 h 45 min | 100 |
Revise paper 1 first and keep it warm. Atomic structure, bonding and the mole are the grammar of chemistry, and they turn up inside paper 2 questions about rates, fuels and analysis.
Is the periodic table given in the GCSE chemistry exam?
On AQA, yes. AQA states that students will be supplied with a periodic table for the exam, so your child does not need to memorise atomic numbers or relative atomic masses. If your child is on another board, check that board’s specification.
The AQA specification says students “will be supplied with a periodic table for the exam” and should be able to use the names and symbols of the first 20 elements, the elements in Groups 1 and 7 and the other elements in the specification, and name compounds of those elements from formulae or symbol equations. The table does the looking up; the student still has to know what to look for.
What the table does not give is everything a question asks around it: the charges on common ions, the formulae of common compounds, the reactivity series, the tests for gases and ions, and the state symbols. Those must be known. So the revision habit is to work with the real table in front of the student for every practice question, until reading it is automatic, and to spend the memorising on what the table leaves out.
How much maths is in GCSE chemistry and how do you revise it?
Maths is at least 20% of the marks in GCSE chemistry, and the calculations come from a short list. GCSE chemistry students who practise that list until it is boring stop losing marks on it.
Ofqual’s rules require that no less than 20 per cent of the marks in GCSE chemistry credit mathematical skills; in combined science the maths marks are split between biology, chemistry and physics in the ratio 1:2:3, so chemistry carries twice biology’s share. On AQA the core calculations sit in the quantitative chemistry topic: relative formula mass, concentration of solutions, moles and amounts in equations for Higher tier, and percentage yield and atom economy for separate chemistry only.
Write every calculation the same way: the relationship in words, the numbers substituted with their units, the rearrangement, the answer with its unit. One calculation a day, five days a week, taken from a past paper and marked with the mark scheme, is enough to make the twenty per cent routine by the mocks. Do the same relative formula mass question with three different compounds before moving on; the method is the thing being learnt, not the answer.
How do you revise chemical equations for GCSE?
Revise chemical equations by writing them from memory, balancing them, and adding state symbols, in that order. GCSE chemistry students who only read balanced equations cannot reproduce them under pressure.
Three stages, each a flashcard set:
- Formulae of common substances. Water, carbon dioxide, methane, oxygen, hydrogen, sodium chloride, sulfuric acid, hydrochloric acid, sodium hydroxide, calcium carbonate. Name on one side, formula on the other.
- Word equation to symbol equation. Take each reaction type the course covers (acid with metal, acid with base, acid with carbonate, combustion, displacement, electrolysis) and write the word equation first, then translate it. Say it aloud as a sentence, “magnesium plus hydrochloric acid gives magnesium chloride plus hydrogen”, before writing symbols. The sentence is the recall; the symbols are the translation.
- Balance and add state symbols. Count each element on both sides, adjust the big numbers only, never the small ones, and finish with (s), (l), (g) or (aq).
Ten minutes of this three times a week from October covers the equations in the course several times over before the exam.
Which required practicals are in GCSE chemistry?
AQA lists eight required practicals for GCSE Chemistry, six of which also appear in Combined Science: Trilogy. GCSE chemistry papers must give at least 15% of their marks to practical knowledge, so each practical is worth a flashcard and a past-paper question.
AQA’s GCSE Chemistry specification sets out eight required practical activities, and the Trilogy specification carries six chemistry practicals among its 21: making a pure, dry soluble salt; electrolysis of aqueous solutions; temperature changes in reacting solutions; the effect of concentration on rate; paper chromatography; and analysing and purifying water samples. Ofqual requires at least 15 per cent of marks in each science to assess practical knowledge.
Chemistry practical questions can ask for method steps in order, for the reason behind a step (“why is the solution heated gently?”), or for a conclusion from a table of results. Flashcard per practical: aim, apparatus, the step students forget, the safety point, the variable controlled. The full AQA required practicals list has every title.
What should a weekly chemistry revision plan look like?
A weekly chemistry plan is one topic, three short sessions, one calculation a day. GCSE chemistry students who keep that rhythm from October have time to cover all ten AQA topics twice before the summer exams.
Monday, blank-page recall of the topic, checked against notes. Wednesday, fifteen minutes of exam questions, marked. Saturday, flashcards, one six-mark question and one set of calculations. Daily, one calculation from a past paper, five minutes. Build the spacing in the revision timetable tool. The GCSE science guide shows how chemistry fits alongside biology and physics, where the same calculation habit earns marks a second time.
If you want a qualified chemistry teacher to run this with your child before the mocks, book a free call.
