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Covalent bonding - AQA SynergyPolymers

A covalent bond is a shared pair of electrons. Covalent bonding results in the formation of molecules or giant structures. Substances with small molecules have low melting and boiling points and do not conduct electricity. Giant covalent substances have very high melting points.

Part of Combined ScienceInteractions over small and large distances

Polymers

have very large . The atoms in a polymer molecule are joined together by strong in long chains. There are variable numbers of atoms in the chains of a given polymer. One example of a polymer is poly(ethene).

A model of a short section of a poly(ethene) molecule, a simple polymer. Polythene molecules will contain thousands of carbon atoms joined together in a chain
Figure caption,
A short section of a poly(ethene) molecule. Poly(ethene) molecules contain thousands of carbon atoms joined together in a chain
Covalent structure of poly(ethene).
Figure caption,
This diagram also represents poly(ethene). The value of 'n' varies, but it is always a large number