# What causes dipole moment?

Nov 15, 2015

The movement of charge.

#### Explanation:

Dipoles are caused when the positive and negative charges in an atom move to opposite ends. This means that at one end of the atom or molecule, there is a higher concentration of positive charge, and at the other end, there is a higher concentration of negative charge.

An example of a molecule with a dipole moment is water, or ${H}_{2} O$. The positive charges are on the hydrogen atoms, anf denoted by the symbol ${\delta}^{+}$, and the negative charge is on the oxygen atom, ${O}_{2}$, and denoted by the symbol ${\delta}^{2 -}$, because the oxygen atom has a charge of -2.