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polarity, in chemical bonding, the distribution of electrical charge over the atoms joined by the bond. Specifically, while bonds between identical atoms, as in H2, are electrically uniform in the sense that both hydrogen atoms are electrically neutral, bonds between atoms of different elements are electrically inequivalent. In hydrogen chloride, for example, the hydrogen atom is .

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Analogously, a triple bond has the combined strength of a σ and two π bonds. As an example, each of the hydrogen atoms in water (H2O) is bonded to the oxygen via a single bond (σ bond) whereas the oxygen atoms in carbon dioxide (CO 2) are bound to the carbon atom via double bonds, each consisting of a σ bond and a π bond.