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10 Cards in this Set
- Front
- Back
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Ionic bond |
-Forms when two atoms combine through electron transfer -occurs when EN difference is greater than 1.67 -all ionic bonds have a small amount of covalent character |
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Covalent bond |
-Forms when two atoms combine by sharing electrons -occurs when EN difference is less than 1.67 -all covalent bonds possess a small amount of ionic character EXCEPT for diatomic molecules |
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Ionic substances |
-Consist of metal and nonmetal ions bonded in a crystal lattice -have high melting points - conduct electricity only when dissolved in water - are usually solids at room temperature |
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Covalent molecular substances |
-Consist of nonmetals bonded to other nonmetals or metalloids -have low melting point - do not conduct electricity -are usually gases at room temperature |
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Network covalent substances |
-Consist of nonmetals bonded to other nonmetals or metalloids -Have very high melting points -Usually do not conduct electricity |
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VSEPR |
Valence shell electron pair repulsion theory |
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Polar bond |
-A bond that contains a positive and negative pole and is therefore a dipole -A polar bond will result any time two different elements are bonded |
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Nonpolar bond |
-Bond that contains no positive or negative poles -molecules can have polar bonds, yet still be nonpolar -Polar bonds can cancel each other out if they are arranged symmetrically around the central Atom |
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Cardinal rule of dissolving |
-Polar solutes generally dissolve in polar solvents -Nonpolar solutes generally dissolve in nonpolar solvents |
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Electronegativity |
The measurement of how much power an atom has to attract electrons |
