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Cyclopentane is commonly represented by the structural formula
and cyclohexane (C6H12) by the structural formula
Note the pentagon between the five carbon atoms for cyclopentane,
and the hexagon between the six carbon atoms for cyclohexane.
The single lines between
represent single covalent bonds.
Note that each carbon atom has
and each hydrogen atom has one bond (valency 1).
Valency is the combining power of an atom.
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