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Line 1: − A ''double bond'' is a [[chemical bond]] between two [[atom]]s which involves four [[electron]]s.+ − − An example of the double bond is the bond between the [[carbon]] atoms in the [[ethylene]] molecule, which is represented schematically by: − − [[Image:Double_bond.jpg]] − − − − In a three-dimensional model, this same ethylene molecule might look like this: − − [[Image:Ethylene_model.jpg]] − − [[category:chemistry]]
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