Polar Bonds and Molecules Chapter 8.4

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Presentation transcript:

Polar Bonds and Molecules Chapter 8.4

Electronegativity Scale

If the difference in electronegativity is between 0.0 - 0.39: Non-Polar Covalent 0.4 – 1.0: moderately polar covalent 1.1- 1.9: very polar covalent bond >2.0 Ionic Bond

Identify the bonds between each atom pair as nonpolar covalent, moderately polar covalent, very polar covalent or ionic. H and Br K and Cl C and O Cl and F Li and O Br and Br

Place the following covalent bonds in order from least to most polar: H-Cl H-Br H-S H-C

Polar Covalent Bond vs Non-Polar Covalent Bond

Polar Covalent vs Non-Polar Covalent

Drawing Bond Dipoles: BF3

Drawing Bond Dipoles: CH3OH

Net Dipole of Molecules Dipole – separation of charges within a molecule between two covalently bonded atoms. Net Dipole – When all the dipole vectors are summed to give one overall dipole.

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