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Vocabulary for Chapter 16


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Chemical Reaction
Well-defined example of a chemical change
Substances that are about to react
The new substances produced
Represents the # of units of each substance taking part in a reaction
migrate through Earth's atmostphere and decompose.
Balanced Chemical Equation
Has the same number of atos of each elelment on both sides of the equation.
Synthesis Reaction
Two of more substances combine to form another substance.
Decomposition reaction
One substance breaks down, or decomposes, into two or more simpler substances.
Double- Displacement Reaction
Takes place if a precipitate water or a gas forms when two ionic compounds formed during this type of reaction.
Exothermic Reactions
some form of energy is given off by the reaction.
Are used to combine with one of the reactants.
Endothermic Reactions
Energy must be provided for the reaction to take place.

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