Bond polarity and dipole movement

Bond Polarity

If the bonding electrons are not shared equally in a covalent bond, then the bond will be polar.

Bond Polarity is determined by the relative difference in electronegativity between two atoms that are joined together by a chemical bond.  A dipole results from an unequal distribution of the electron pair in the bond between the atoms.

Dipole Movement

Dipole movement is a property of a molecule whose charge distrubution can be represented by a center of positve charge and a center of negative charge.