1. The polarity of a covalent bond can be measured in terms of dipole moment which is defined as:
µ = q x 2d, where µ is the dipole moment, q is the charge, 2d is the distance between the two charges.
2. The dipole moment is a vector quantity and the direction of the dipole moment points from the negative charge to positive charge.
3. The unit of dipole moment is Coulomb metre (C m). It is usually expressed in Debye unit (D).
4. 1 Debye = 3.336 x 10-30 Cm
