Lecture 7 NotesChemical Bonds in Chemistry

Lecture 7 NotesChemical Bonds in Chemistry - Chemical Bonds...

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Chemical Bonds in Chemistry B. A. Rowland 53750/53760 Chemical Bonds Chemical bonds can be classified as ionic, covalent, polar covalent (a cross between ionic and covalent) , or metallic . The two characteristics of chemical bonds that we will be interested in will be bond length and bond strength . Ionic Bonds Ionic bonds result when a metal (element from the left hand side of the P.T.) reacts with a non-metal (right hand side of the P.T.) and a wholesale swap of electrons occurs (i.e. the metal gives up its valence electrons and the non-metal accepts them). What holds the bond together is the electrostatic interaction , which Coulomb’s law describes. The positively charged metal ion will be attracted to the negatively charged non-metal ion. An ionic bond is very strong, and we can use the concepts of ionic radius and ionic charge to quantify the strength of the bond. Covalent Bonds Sometimes when atoms come together they ‘share’ their valence electrons instead of doing a swap. This situation would be known as a
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