a process that produces chemical change.

are the substance that exit before the reaction begins

a substances that forms as a result of the reaction.

tells chemist at a glance the reactants, products, physical state, and the proportions of each substance.

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chemicals

Term	Definition
chemical reaction	a process that produces chemical change.
reactant	are the substance that exit before the reaction begins
product	a substances that forms as a result of the reaction.
chemical equation	tells chemist at a glance the reactants, products, physical state, and the proportions of each substance.
endothermic reaction	absorbs heat energy
exothermic reation	releases heat energy.