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Chapter 11 Definitions

Activity Series A list of elements in order of decreasing activity; the activity series of halogens is Fl, Cl, Br, I
Balanced Equation A chemical equation in which mass is conserved; each side of the equation has the same number of atoms of each element
Catalyst A substance that increases the rate of reaction by lowering the activation energy barrier; the catalyst is not used up in the reaction
Chemical Equation An expression representing a chemical reaction
Coefficients A small whole number that appears in front of a formula in a balanced equation
Combination Reaction A chemical change in which two or more substances react to form a single new substance
Combustion Reaction A chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light.
Complete Ionic Equation Equation that shows dissolved ionic compounds as dissociated free ions
Decomposition reaction A chemical change in which a single compound is broken down into two or more simpler products
Double-Replacement Reaction A chemical change that involves an exchange of positive ions between two compounds
Net Ionic Equation An equation for a reaction in solution showing only those particles that are directly involved in the chemical change
Single-Replacement Reaction A chemical change in which one element replaces a second element in a compound
Skeleton Equation A chemical equation that does not indicate the relative amounts of reactants and products
Spectator Ion An ion that is not directly involved in a chemical reaction; an ion that does no change oxidation number or composition during a reaction
Created by: heather4354