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Double and Triple Bonds

Part of the Structure and Bonding section of Coddy's Chemistry journey. Lesson 11 of 49.

Two shared pairs make a double bond; three make a triple bond.

Carbon dioxide: O=C=O with two lone pairs on each O

CO₂: two double bonds

Use them when single bonds leave an atom short of 8: move a lone pair into a bond.

N₂ and HCN have triple bonds. Triple bonds are the shortest and strongest.

N2 with a triple bond and a lone pair on each N; HCN with H-C single and C-N triple

N₂ and HCN: triple bonds

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Challenge

Carbon dioxide is the gas plants take in. Draw its Lewis structure.

Try it yourself

Lewis boardDraw the Lewis structure of CO2
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This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Structure and Bonding

1Ionic Bonding

Why Atoms BondForming IonsThe Ionic BondIonic FormulasPolyatomic IonsIonic LatticesRecap - Salt Factory

4Polarity

Electronegativity and BondsPolar and Non-polar BondsIonic or CovalentPolar MoleculesWhen Dipoles CancelRecap - Dipole Hunt

7Functional Groups

Carbon ChainsStructural FormulasAlcoholsCarboxylic AcidsEsters and EthersAldehydes, Ketones, AminesRecap - Group Finder

2Covalent Bonds

Sharing ElectronsCounting Valence ElectronsDrawing Lewis StructuresDouble and Triple BondsLone PairsFormal ChargeLewis Structures of IonsRecap - Molecule Builder

5Forces Between Molecules

London ForcesDipole-Dipole ForcesHydrogen BondsBoiling PointsLike Dissolves LikeRecap - Boiling Contest

8Practice Problems

Recap - Polar Bonds SurveyRecap - Pigments and HexaneRecap - Butanol and EtherRecap - Dots on an Oxide

3Shapes of Molecules

Electron GroupsLinear and Trigonal PlanarTetrahedral MoleculesPyramids and Bent MoleculesBond AnglesRecap - Shape Detective

6Metals and Giant Structures

Metallic BondingDiamond and GraphiteGiant Covalent StructuresFour Kinds of SubstanceRecap - Material Match