Lacey_Che131_F2011_Lect-26p(1)

Lacey_Che131_F2011_Lect-26p(1) - Lec Lec-26: Chemical...

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Lec-26: Chemical Bonding Lec 26: Chemical Bonding Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 1 Quantum numbers Chemical bonds result from the attractive interactions which holds atoms together in molecules and compounds. Atoms may transfer or share electrons, and either process may provide for a stable arrangement of electrons between the atoms that results in the formation of molecules. Ionic Bonds, Covalent Bonds, and Metallic Bonds. Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 2
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Bond types ` Formed from electrostatic attractions of closely packed, Ionic Bond attractions of closely packed, oppositely charged ions. ` Formed when an atom that Formed when an atom that easily loses electrons reacts with one that has a high electron affinity . ` When a nonmetal and a metal react ,the valence orbitals of the metal are emptied to achieve noble gas electron configuration. The valence orbitals of the nonmetal gains electrons to achieve a noble gas electron configuration. Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 3 Bond types Covalent Bond ` When two nonmetals react : They share electrons to achieve Noble Gas Electron configuration. configuration. If the electrons are shared equally, a covalent bond is formed. Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 4
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Bond types Metallic Bond ` A metallic bond consists of the nuclei of metal atoms surrounded by a “sea” of shared electrons. 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 5 Favored electron configurations Noble gas electron configurations are favored Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 6
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Lewis Theory of Bonding ` Atoms form bonds by sharing electrons.
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This note was uploaded on 11/18/2011 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

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Lacey_Che131_F2011_Lect-26p(1) - Lec Lec-26: Chemical...

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