List the first four members of the homologous series of alkenes.

The first four members of the homologous series of alkenes are ethene, propene, butene, and pentene.

This question tests the recall of specific names of alkenes, which is fundamental in understanding organic chemistry and the properties of these compounds. This response is aligned to Structure and formulae of alkenes because it explains recall the first four members of the homologous series of alkenes as ethene, propene, butene and pentene using the correct AQA GCSE Chemistry organic context. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.