Alkenes – Lesson & Worksheet – Unit 4 – IGCSE Chemistry

Alkenes – Lesson & Worksheet – Unit 4 – IGCSE Chemistry
Structure, General Formula, Unsaturation & Isomer Naming

This Synapse Science resource introduces the alkene homologous series from Edexcel IGCSE Chemistry. Students explore the C=C functional group, the concept of unsaturation, and learn to draw and name alkenes with up to four carbon atoms, including unbranched-chain isomers.

TOPICS COVERED – SPECIFICATION POINTS

• 4.23: Know that alkenes contain a particular functional group (C=C)
• 4.24: Know the general formula for alkenes
• 4.25: Explain why alkenes are classified as unsaturated hydrocarbons
• 4.26: Understand how to draw the structural and displayed formulae for alkenes with up to four carbon atoms in the molecule, and name the unbranched-chain isomers:contentReference[oaicite:0]{index=0}

WHAT’S INCLUDED

• Editable PowerPoint lesson with theory, diagrams, and naming practice
• Student worksheet with scaffolded formula drawing and functional group tasks
• Examples of poly(ethene), poly(propene) and discussion on alkene reactivity
• Clear explanation of addition reactions and double bond properties

KEY FEATURES

• Visual explanation of the C=C bond and its role in reactivity
• Naming and drawing tasks for alkenes: ethene, propene, butene, etc.
• Clear comparison to alkanes and how unsaturation impacts use
• Fully aligned with Edexcel IGCSE Unit 4 – Paper 2 (Triple)
• Classic Synapse Science layout for seamless teaching and revision

KEYWORDS
Edexcel IGCSE Chemistry, Alkenes, Unsaturated Hydrocarbons, Double Bond, Functional Group, Structural Formula, Displayed Formula, Isomers, Naming Organic Compounds, Synapse Science, Unit 4, Worksheet, Lesson