Edexcel GCSE Chemistry
Explore your course, one topic at a time.
Course version · Pearson-GCSE-ChemistryVersion from Mar 2026Change version
Choose the version your school teaches. Your teacher can confirm which one, including for resits.
Explore your topics
10 topics
Assessment and exam guidance
What Gets Top Grades
Knowledge & Understanding
Demonstrates comprehensive and accurate knowledge
- Uses correct subject-specific terminology
- Shows detailed understanding of concepts
- Makes accurate connections between topics
- Demonstrates depth beyond surface-level knowledge
Application
Applies knowledge effectively to new contexts
- Selects relevant knowledge for the question
- Adapts understanding to unfamiliar scenarios
- Uses examples appropriately
- Shows awareness of context
Analysis & Evaluation
Develops sophisticated analytical arguments
- Constructs logical chains of reasoning
- Considers multiple perspectives
- Weighs evidence to reach justified conclusions
- Acknowledges limitations and nuances
Key Command Words
Give a single fact or term
Name, select, or recognise
Set out main features briefly
Give an account of what something is like or what happens
Give reasons with developed cause→effect chains
State similarities AND differences (both required)
Examine in detail showing cause→effect→consequence chains
Weigh up BOTH sides, reach JUSTIFIED conclusion
Make judgments about importance with justification
Show formula→substitution→calculation→answer with units
Tips and common mistakes
Common Exam Mistakes
Pitfalls to avoid in your exams
- •Confusing intermolecular forces with covalent bonds when explaining low melting points of simple molecular substances.
- •Assuming all covalent substances have high melting points (failing to distinguish between simple molecular and giant covalent).
- •Incorrectly stating that ionic compounds conduct electricity when solid.
- •Failing to mention delocalised electrons when explaining electrical conductivity in graphite or metals.
- •Confusing the general formula or structure of alkanes with alkenes
- •Failing to show all covalent bonds in structural drawings
- •Incorrectly identifying the functional group of alkenes
- •Misunderstanding the colour change associated with bromine water tests
Top Examiner Tips
Expert advice for exam success
- •Always link the physical property (e.g., high melting point) to the strength of the forces being overcome (e.g., strong electrostatic forces or strong covalent bonds).
- •When asked about conductivity, specify the state (solid, molten, or aqueous) and the presence of charged particles (ions or delocalised electrons).
- •Use the term 'intermolecular forces' only for simple molecular substances, never for giant structures.
- •Be prepared to draw or interpret dot-and-cross diagrams for simple molecules.
- •Ensure all covalent bonds are clearly drawn in structural formulas
- •Remember that bromine water turns from orange to colourless in the presence of an alkene
- •Be prepared to write balanced equations for the complete combustion of hydrocarbons
- •Clearly distinguish between saturated (single bonds only) and unsaturated (containing C=C) compounds
Ready for a little practice?
Create your account to start practising Chemistry.
7 days Premium · Then free forever · No card, no charge