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008Chemical Reaction

Chemical Reactions/Formulas/Law of Conservation of Mass

TermDefinition
Chemical change the formation of a new substance with different properties; cannot be undone by physical means
Chemical equation a representation of a chemical reaction by symbols and numbers
Chemical formula a representation of a molecule or compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element
Chemical reaction a change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)
Coefficient the number placed in front of a chemical formula in a chemical equation; represents the number of molecules of that substance
Compound a substance made of two or more elements
Law of conservation of mass matter is not created or destroyed; only rearranged
Molecule combined atoms of the same element (e.g., O2)
Precipitate the formation of solids from a solution
Product substance(s) resulting from a chemical reaction
Reactant substances that are combined and changed during a chemical reaction
Subscript the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula
Created by: frattodp
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