11.1 Formulae, functional groups and terminology
- Syllabus
- 0620–2026–2027
- Topic
- 11.1
- Level
- —
11.1.1—And interpret the displayed formula of
- Draw and interpret the displayed formula of a molecule to show all the atoms and all the bonds
11.1.2—Write and interpret general formulae
- Write and interpret general formulae of compounds in the same homologous series, (a) alkanes, C nH2n+2 (b) alkenes, CnH2n (c) alcohols, C nH2n+1OH (d) carboxylic acids, CnH2n+1COOH
11.1.3—Functional group as an atom or group
- Identify a functional group as an atom or group of atoms that determine the chemical properties of a homologous series
11.1.7—Structural formula is an unambiguous
- State: a structural formula is an unambiguous description of the way the atoms in a molecule are arranged, including CH 2=CH2, CH3CH2OH, CH3COOCH3
11.1.8—Structural isomers as compounds with
- Define structural isomers as compounds with the same molecular formula, but different structural formulae, including C4H10 as CH3CH2CH2CH3 and CH3CH(CH3)CH3 and C4H8 as CH3CH2CH=CH2 and CH3CH=CHCH3
11.1.4—Homologous series is a family of
- State: a homologous series is a family of similar compounds with similar chemical properties due to the presence of the same functional group
11.1.5—Saturated compound has molecules in
- State: a saturated compound has molecules in which all carbon–carbon bonds are single bonds
11.1.6—An unsaturated compound has molecules
- State: an unsaturated compound has molecules in which one or more carbon– carbon bonds are not single bonds
11.1.9—Homologous series features: same
- Describe homologous series features: same functional group and general formula, adjacent members differ by -CH2-, physical properties show trends, chemical properties are similar
Objective notes
9 learning objectivesConceptIGCSE Chemistry