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21 Cards in this Set
- Front
- Back
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ionic bond
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chemical bond that occurs when an atom transfers an eletron to another atom
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ion
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atom that has become electrically charged as a result of gaining or losing an electron
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covalent bond
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chemical bond that forms when two atoms share eletrons
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molecule
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two or more atoms held together by covalent bonds
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chemical reation
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breaking of old and formation of new chemical bonds that result in new substances
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reactant
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starting material for a chemical reaction
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product
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material creather as a result of a chemical reaction
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polar molecule
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molecule in which oppisite ends have oppisite electric charges
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hydrogen bond
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bond created by weak attraction od a slighty positive hydrogen atom to a slightly negative portion of another molecule
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cohesion
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tendency of molecules of the same kind to stick to one another
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adhesion
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attraction between unlike molecules
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thermal energy
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total amount of energy associated with the random movement of atoms and molecules in a sample of matter
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temperature
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measure of the average energy of random motion of particles in a substance
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solution
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uniform mixture of two or more sunstances
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solvent
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substance in a solution that dissolves the other substance and is present in the greater amount
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solute
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substance in a solution that is dissolved and is present in a lesser amount
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aqueous solution
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solution in which water is solvent
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acid
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compound that donates H+ ions to an aqueous solution and measures less that 7 on the pH scale
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base
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compund that removers H+ ions from an aqueous solution and that measures more than 7 on the ph scale
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pH scale
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a range of number used to describe how acidic or basic a solution is; ranges from 0 to 14
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buffer
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substance that maintains a fairly constant pH in a solution by accepting H+ ions when their levels rise and donating H+ ions when their levels fall
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