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| − | A ''double bond'' is a [[chemical bond]] between two [[atom]]s which involves four [[electron]]s.
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| − | An example of the double bond is the bond between the [[carbon]] atoms in the [[ethylene]] molecule, which is represented schematically by:
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| − | [[Image:Double_bond.jpg]]
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| − | In a three-dimensional model, this same ethylene molecule might look like this:
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| − | [[Image:Ethylene_model.jpg]]
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| − | [[category:chemistry]]
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