CHEM 1A03 Lecture Notes - Lecture 3: Chemical Polarity, Electronegativity

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

When a polar covalent bond forms (0. 41< e<1. 7), shared electrons are pulled closer to the more electronegative atom. This gives each atom in the bond a partial positive ( ) or a partial negative ( charge. If a molecule consists only of 2 atom, and this bond is polar the entire molecule is also polar and it poses a net dipole in the direction of the more electronegative atom. The term dipole is used to describe the charge separation for the entire molecule. It is possible for a molecule with polar bonds to be a nonpolar molecule (no net dipole)