BioCoach Activity

Concept 5: Polarity

Many combinations of different elements result in unequal electron sharing, called polar bonding.

Polarity: static

The sharing of electrons in covalent bonds is not always equal. In a covalent bond, atoms such as oxygen contain a higher localization of negative charge density than their atomic partners. As a result, the electron distribution is asymmetric, or polar, and the oxygen atom is said to be electronegative. This asymmetry results in regions of slight negative and positive charge in different regions of the molecule, denoted by the Greek symbol δ, for "partial" charge.