Chapter 9
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Created by:
kbreaux2013 on January 18, 2012
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10 terms
Terms | Definitions |
|---|---|
 coordinate covalent bond | Forms when one atom donates a pair of electrons to be shared with an atom or ion that needs two electrons to become |
| covalent bond | a chemical bond that results from the sharing of valence electrons |
| endothermic | a chemical reactiodn in which a greateer amount of energy is required to break the existing bonds in the reactants than is realsed when teh new bonds form in the product molecules |
| exothermic | a chemical reaction in which more energy is released than is required to break bonds in the initial reaction |
| Lewis structure | a model that uses electron-dot structures to show how electrons are arranged in molecules. Pairs of dots or lines represent bonding pairs. |
| molecule | forms when two or more atoms covalently bond and is lower in potential energy than ists constituent atoms |
| polar covalent | a type of bond that forms when electrons are not shared equally |
| resonance | condition that occurs when more than one valid Lewis structure exists for the same molecule. |
| structural formula | a molecular model that uses symbols and bonds to show relative positions of atoms; can be predicted for many molecules by drawing the Lewis structure. |
| VSEPR model | Valence Shell Electron Pair Repulsion model, which is based on an arrangemnet that minimizes the repulsion of shared and unshared pairs of electrons arond the central atom. |
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