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10 Cards in this Set
- Front
- Back
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properties of ionic compounds
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solids at room temperature
very high melting and boiling point crystal at solid state dissociate in water, form positive and negative ions metal + nonmetal transfer electrons |
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electrolytes
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contain ions, conduct electricity.
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properties of covalent compounds
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solids, liquids, gases
low melting and boiling point that varies with polarity. high polarity means high mp/bp, low polarity means low mp/bp crystalline or amorphous structure don't dissociate and don't conduct electricity 2 nonmetals together share electrons |
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bond strength
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double and triple bonds are more stable than single bonds.
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bond energy
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the amount of energy required to break a bond
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bond length
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the distance separating the nuclei of 2 adjacent atoms. single>double>triple
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resonance
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2 or more Lewis structures that contribute to real structure
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Valence Shell Electron Pair Repulsion
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all electrons around the central atom arrange themselves so that they are as far away as possible to limit electronic repulsion. Used to predict the shape of molecules.
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types of bond orientations
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linear, 180
trigonometric planar, 120 tetrahedral, 109.5 (primary structure of a full octet) trigonal pyramidal, 107 (full octet with a lone pair) bent/angular structure 104.5 (full octet with 2 lone pairs) |
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rules of VSEPR
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1. electrons get as far away as possible
2. unbound electrons take up more space |
