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Key word Definition
Delocalised electrons Shared between more than two atoms.
A reactant is added to an unsaturated molecule to make a
Addition reaction
saturated molecule.
An atom or group of atoms is replaced with a different atom or
Substitution reaction
group of atoms.
Electrophile Electron pair acceptor.
Nucleophile Electron…

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The specific arrangements of atoms that occurs in the structure
Repeat unit
over and over again.
A polymer that breaks down completely into carbon dioxide and
Biodegradable polymer
A polymer that breaks down into smaller fragments when exposed
Degradable polymer
to light, heat or moisture.
Synthetic polymers designed to…


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