Chemistry Chapter 11 Vocab

2. a list of elements in order of decreasing activity; the activity series of halogens
5. a chemical change that involves an exchange of positive ions between two compounds
6. a chemical change in which two or more substance react to form a single new substance; also called a synthesis reaction
8. a sustance that increases the rate of reaction by lowering the activation-energy barrier; the catalyst is not used up in the reaction
11. an expression representing a chemical reaction
12. a chemical change in which a single compound is broken down into two or more simpler products

1. a chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light
3. a chemical equation that does not indicate the relative amounts of reaactants and products
4. an equation for a reaction in solution showing only those particles that are directly involved in the chemical change
7. a chemical change in which one element replaces a second element in a compound; also called a displacement reaction
9. an ion that is not directly involved in a chemical reaction; an ion that does not change oxidation number or composition during a reaction
10. a small whole number that appears in front of a formula in a balanced chemical equation
11. an equation that shows dissolved ionic compounds as dissociated free ions