Describe saturated and unsaturated hydrocarbons with their general formulas, examples, and differences.

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Saturated hydrocarbons (alkanes) have only single covalent bonds between carbon atoms (CnH2n+2), are stable, and are also called paraffins; examples are methane, ethane, and propane. Unsaturated hydrocarbons have a double bond (alkenes, CnH2n) or triple bond (alkynes, CnH2n-2) between carbon atoms, are less stable and more reactive, and are also called olefins; examples are ethene and ethyne.