Chapter 11

5. A chemical change in which one element replaces the second element in the compound
10. A substance that speeds up the reaction but is not used up in the reaction
11. Lists metals in order of decreasing reactivity
12. An ion that appears on both sides of the equation and is not directly involved in the equation
13. A chemical change in which two or more substances react to form a single new substance

1. A chemical change involving an exchange of positive ions between two compounds
2. A chemical change in which a single compound breaks down into two or more simpler products
3. In which each side of the equation has the same number of atoms in each element and mass is conserved
4. A representation of a chemical reaction
6. An equation for a reaction in a solution that shows only those particles that are directly involved in the chemical change
7. An equation that shows dissolved ionic compounds as dissociated free ions
8. Small whole numbers that are placed in front of the formulas in an equation in order to balance it
9. A chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat or light