4. Chemical Bonding - Chemical Bonding Chapter 4 Valence...

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Chemical Bonding Chapter 4
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Valence electrons Valence electrons are the outer shell electrons outer shell electrons of an atom. The valence electrons are the electrons that participate in chemical bonding participate in chemical bonding . 1A 1 ns 1 2A 2 ns 2 3A 3 ns 2 np 1 4A 4 ns 2 np 2 5A 5 ns 2 np 3 6A 6 ns 2 np 4 7A 7 ns 2 np 5 Group # of valence e - e - configuration
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Consists of the symbol of an element and one dot for each valence electron in an atom of the element.
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Li + F Li + F - The Ionic Bond 1s 2 2s 1 1s 2 2s 2 2p 5 1s 2 1s 2 2s 2 2p 6 [He] [Ne] Li Li + + e - e - + F F - F - Li + + Li + F - Electrostatic force that holds ions together in an ionic compound.
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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 + 7e - 7e - F F 8e - 8e - F F F F Lewis structure of F 2 lone pairs lone pairs lone pairs lone pairs single covalent bond single covalent bond
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8e - H H O + + O H H O H H or 2e - 2e - Lewis structure of water
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This note was uploaded on 04/10/2010 for the course CHM CHM101 taught by Professor Woljaong during the Fall '07 term at Multimedia University, Cyberjaya.

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4. Chemical Bonding - Chemical Bonding Chapter 4 Valence...

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