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Chemical bond
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Strong attractive force that exists between atoms in a molecule
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Ionic bond
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Bond between oppositely charged ions, formed from atoms by transfer of 1 or more electrons
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Covalent bond
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Formed between 2 or more atoms by a sharing of electrons
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Metallic bonds
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Usually in solid metals, bonding electrons are relatively free to move throughout the 3D structure
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Lewis symbol
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Chemical symbol for an element with a dot for each valence electron
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Octet rule
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Stating that bonded atoms tend to possess or share a total of 8 valence-shell electrons
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Lattice energy
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Required to separate completely the ions in an ionic soild
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Born-Haber cycle
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Thermodynamic cycle based on Hess's law that relates the lattice energy of an ionic substance to its enthalpy of formation and to other mesurable quantites
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Lewis structures
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Representation of covalent bonding in a molecule that is drawn using Lewis symbols, shared electron pairs: lines, unshared electron pairs: dots, only valence-shell electrons are shown
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Single bond
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Covalent bond involving 1 electron pair
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Double bond
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Covalent bond involving 2 electron pairs
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Triple bond
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Covalent bond involving 3 electron pairs
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Bond length
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Distance between the centers of two bonded atoms
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Nonpolar covalent
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Measure of degree to which the electronsare shared equally between 2 atoms in a chemical bond
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Polar covalent
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Measure of degree to which the electronsare shared unequally between 2
atoms in a chemical bond
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