Chapter 9.4-9.5 as handout

Chapter 9.4-9.5 as handout - A c ovalent bond is a chemical...

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1 A covalent bond is a chemical bond in which two or more electrons are shared by two atoms. Why should two atoms share electrons? F F + F F F F F F Lewis structure of F 2 9.4 Note that only one valence electron from each atom participates in the bond. The others are lone pairs. H H O + + O H H O H H or Lewis structure of water Double bond – two atoms share two pairs of electrons or Triple bond – two atoms share three pairs of electrons or 9.4 O C O O C O N N N N 9.4 Lewis Dot Structures Lewis’ dot diagrams keep track of the valence electrons in a molecule. The Lewis structure: - only represents valence electrons - represents the bonding pair of electrons as either a line of a pair of dots - represents the remaining (lone pair) electrons as pairs of dots on individual atoms, i.e. not shared
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2 Lengths of Covalent Bonds Bond Lengths Triple bond < Double Bond < Single Bond 9.4 74 pm 161 pm H 2 HI Bond length is defined as the distance between the centers of the nuclei of two covalently bound atoms.
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This note was uploaded on 02/20/2012 for the course CHEM 1230 taught by Professor Anderson during the Spring '08 term at Toledo.

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Chapter 9.4-9.5 as handout - A c ovalent bond is a chemical...

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