Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 5  
spacerspacerIntroduction
spacerspacerObjectives
spacerspacerReading


spacer5.1 Ionic
spacerBonding

spacerIonic Bonding in Sodium Chloride
spacerIonic Bonding in Magnesium Chloride
spacerProperties of Ionic Compounds
spacer5.2 Covalent
spacerBonding
spacer5.3 Polar Covalent
spacerBonding

spacer5.4 Bond
spacerDipoles

spacer5.5 Electroneg-
spacerativity

spacer5.6 Classification
spacerof Bond Type
spacer5.7 Polarity of
spacerMolecules
spacer5.8 Writing
spacerChemical
spacerFormulae
spacerWriting formulas containing simple ions
spacerWriting formulas containing  polyatomic ions
spacerUsing parentheses in formula writing
spacer5.9 Information in
spacera Chemical
spacerFormula
spacerNumber ratio of atoms
spacerNumber ratio of ions
spacer5.10 Oxidation
spacerNumbers
spacerAssignment of Oxidation Numbers


spacerspacerProblems
spacer1 | 2

Unit #5 COMPOUNDS

5.4 - Bond Dipoles

Another way to indicate the polarity of the bond is to draw the bond dipole moment. The separation of charge in a polar covalent bond creates an electric dipole. A bond dipole is represented an arrow.

The direction of the arrow always points the the negative end of the bond. A "+" is placed at the tail of the arrow to indicate the positive end of the bond. Bond dipoles are vectors.

In section 5.3, we have already determined that hydrogen fluoride molecule has a polar bond. The dipole moment for this molecule is drawn over the H-F bond and points in the direction of the fluorine molecule.




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