CHEM 101 Lecture Notes - Lecture 10: Nonmetal, Electronegativity, Covalent Bond
1 Oct 2016
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Bond polarity: a measure of the degree of inequality in the sharing of electrons between two atoms in a chemical bond o. The greater the electronegativity difference between the two bonded atoms, the greater the polarity of the bond. Nonpolar covalent bond: a covalent bond in which there is an equal sharing of electrons between atoms o. There is unequal sharing of electrons between two atoms. Creates fractional positive and negative charges on atoms. Electrons spend more time near the more electronegative atom of the bond and less time near the less electronegative atom of the bond. For h2o, the bond polarities associated with the two hydrogen-oxygen bonds do not cancel one another because of the nonlinearity of the molecule. The effects of the two polar bonds are canceled as a result of the oxygen atoms being arranged symmetrically around the carbon atom. Binary molecular compound: a molecular compound in which only two nonmetallic elements are present o.
