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GCSE Chemistry · key term
The section of a polymer chain that occurs repeatedly along the molecule.
Used by AQA, Edexcel and OCR
Specification 4.2.2.5, 4.7.3.2 · Paper 1, Paper 2
A group of atoms whose pattern occurs many times along a polymer molecule.
Revise: Polymer PropertiesEach polymer molecule is usually a long chain containing a pattern of atoms that repeats many times. This repeated pattern is called the repeating unit.
The smallest section of a polymer chain whose pattern repeats along the chain.
Specification 9.17C, 9.18C · Paper 2
The small arrangement of atoms that occurs repeatedly along a polymer molecule.
Revise: Polymer DefinitionA polymer is a substance of high average relative molecular mass made up of small repeating units. Each polymer molecule contains the same small arrangement of atoms repeated many times along a long chain. The word polymer reflects this idea: poly means many and mer means part or unit.
The smallest section of a polymer chain that occurs repeatedly along the chain.
Specification C2.2d, C6.2d, C6.2e · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Structure and Bonding of PolymersSmall molecules called monomers can join together to produce these chains; the recurring section of the finished chain is its repeating unit.
The smallest section of a polymer chain that repeats along the chain.
The section of a polymer chain whose pattern repeats many times.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Addition polymerisation principlesThe recurring section of this chain is its repeating unit.
The section of a polymer chain that repeats many times along its length.
Do not include the eliminated water within the polymer's repeating unit: it is a separate small-molecule product.
Use the full definition: a polymer is a substance with a high average relative molecular mass and is made up of small repeating units.
Do not describe a polymer as simply a collection of monomers. Refer to repeating units joined within long polymer molecules.
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