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http://www.bbc.co.uk/education/guides/zm9hvcw/revision<br />

students will learn what effects functional groups have on<br />

organic compounds and how chemical reactinos are used in<br />

organic compounds.<br />

A homologous series is a family of hydrocarbons with similar<br />

chemical properties who share the same genral formula.<br />

The general formula of the alkanes is CnH2n+2<br />

methane- (natural gases) cooking, heating<br />

propane- used in gas cylinders for BBQ etc<br />

octane- used in petrol for cars.<br />

The longest unbranched chain containing the functional group is th<br />

parent molecule, or simply the longest unbranched chain for alkane<br />

rememeber that, the longest chain can go round a bend.<br />

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