A polar molecule is a molecule that has an unevenly distributed electrical charge, meaning that one end of the molecule is slightly positive while the other end is slightly negative. This occurs when an atom of one element bonds covalently with an atom of another element, and the two elements have different electronegativities. Electronegativity is a measure of an atoms ability to attract electrons towards itself in a chemical bond. When two atoms with different electronegativities bond, the electrons in the bond are not shared equally, resulting in a separation of charge and the formation of a polar molecule/09%3A_Covalent_Bonding/9.17%3A_Polar_Molecules). A classic example of a polar molecule is the water molecule, where the oxygen atom is more electronegative than the hydrogen atoms, resulting in a separation of charge and the formation of a polar molecule.