Coefficient - the number placed in front of the chemical formula to balance a chemical equation, subscript - the small number that goes beside a chemical symbol to show how many atoms there are, chemical formula - a shorthand representation of an element using letters and numbers, Law of Conservation of Mass - this states that mass cannot be created or destroyed in a chemical reaction. , Law of Conservation of Energy - this states that energy cannot be created or destroyed it just changes forms., chemical equation - this is a representation of a chemical reaction using symbols and numbers, product - this is found to the right of the yield sign and is what is made during a chemical reaction., reactant - this is the substances that are put together for a chemical reaction; found on the left side of the arrow., yield sign - This is the arrow that is used in a chemical equation., chemical reaction - substances react and form at least one new substance with different properties., endothermic reaction - energy is absorbed causing the temperature to drop during this kind of reaction., exothermic reaction - energy is released causing the temperature to increase during this kind of reaction. ,

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