Chemical Reaction - When atoms rearrange to form NEW substances, Law of Conservation of Mass - The total number of atoms of each element is NOT changed during a chemical reaction., Mass - How much matter is in an object, Atom - The smallest part of all matter, Conserve - To prevent loss of something, Reactant - A pure substance that is present before a reaction but not after, Equation - A written representation of a chemical reaction, Coefficient - A number placed in front of a chemical symbol or formula in order to balance the equation,

Vocabulary - Chemical Reaction

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