Learning objective
Describe alkenes as hydrocarbons with a double carbon-carbon bond.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Reactions of alkenes and alcohols (chemistry only)
Subtopic
Structure and formulae of alkenes
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Quick explanation
Describe alkenes as hydrocarbons with a double carbon-carbon bond
- This point belongs to Reactions of alkenes and alcohols (chemistry only), especially Structure and formulae of alkenes.
- You need to be able to describe alkenes as hydrocarbons with a double carbon-carbon bond.
- The key ideas to know are alkene.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Structure and formulae of alkenes to exam-style questions, flashcards, and revision notes for Reactions of alkenes and alcohols (chemistry only).
Quick student answer
How does alkenes work?
Direct answer
In Chemistry, this page helps you answer questions about alkenes within Reactions of alkenes and alcohols (chemistry only). Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are alkene and double bond.
Key terms
- alkene: A hydrocarbon that contains at least one carbon-carbon double bond.
- double bond: A chemical bond where two pairs of electrons are shared between two atoms.
Common trap
Misunderstanding Alkenes: Remember that alkenes are unsaturated hydrocarbons due to the presence of a double carbon-carbon bond, while alkanes are saturated and contain only single bonds.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- State the general formula for the homologous series of alkenes as CnH2n.
Structure and formulae of alkenes
- Explain that alkenes are unsaturated because they contain two fewer hydrogen atoms than the alkane with the same number of carbon atoms.
Structure and formulae of alkenes
- Recall the first four members of the homologous series of alkenes as ethene, propene, butene and pentene.
Structure and formulae of alkenes
- Represent alkene molecules in displayed, structural and molecular formula forms.
Structure and formulae of alkenes
- Recognise alkenes from their names or from given formulae.
Structure and formulae of alkenes