Draw fully displayed structural formulae of the first four members of the alkenes and the products of their addition reactions with hydrogen, water, chlorine, bromine and iodine.

In the subtopic Reactions of alkenes, this learning objective focuses on draw fully displayed structural formulae of the first four members of the alkenes and the products of their addition reactions with hydrogen, water, chlorine, bromine and iodine. It sits within Reactions of alkenes and alcohols (chemistry only) for AQA GCSE Chemistry 8462 Unit 4.7 Organic chemistry, so the explanation must stay anchored to organic chemistry rather than becoming a generic carbon-compounds fact. Approved keywords to use include alkene, addition reaction, hydrogen, water. Alkene. means a hydrocarbon that contains a carbon-carbon double bond Avoid the mistake of students often forget to represent the double bond in the structural formula of alkenes, leading to incorrect molecular representations; instead, always ensure to include the double bond between the carbon atoms when drawing the structural formula of alkenes For exam answers, regularly practice drawing the fully displayed structural formulae for the first four alkenes and their addition reaction products 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.