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Alkenes

The are unsaturated hydrocarbons.

Hydrocarbons 鈥 because they contain hydrogen and carbon only.

Unsaturated 鈥 because they contain at least one C=C. Each alkene containing one C=C has two fewer hydrogen atoms than the corresponding alkane.

The general formula for the alkanes is CnH2n.

The table shows the first four alkenes

Gas table 2