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Chemical reaction

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A process that involves the rearrangement of the molecular or ionic structure of a substance.

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Reactant

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A substance that takes part in and undergoes change during a reaction.

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Product

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A substance that is formed as the result of a chemical reaction.

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Bond energy

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The measure of bond strength in a chemical bond.

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Equilibrium

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A state in which opposing forces or influences are balanced.

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Activation energy

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The minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.

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Exothermic

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A process or reaction that releases energy in the form of heat.

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Endothermic

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A process or reaction that absorbs energy in the form of heat.

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Monomer

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A molecule that can be bonded to other identical molecules to form a polymer.

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Polymer

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A substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together.