1. The Last Chapter on Chemistry

2. Chemical Reaction
Two or more substances combining to create something new
equals
plus

3. Precipitate
A gas or solid given off in a chemical reaction

4. Chemical Bond
The joining of two elements to form a new substance

5. Chemical Formula
Using symbols to abbreviate a compound

6. Chemical Equation
A short way (with symbols) to explain what is happening in a chemical reaction

7. Reactant
What you start with in a chemical reaction

8. Product
What you get after a chemical reaction happens

9. Law of Conservation of Mass
Mass can not be created or destroyed – it can only change form

10. subscript
The numbers to the right and behind a chemical formula

11. Coefficients
The numbers in front of a chemical formula

12. Synthesis Reaction
Two elements added together to create a new compound

13. Decomposition
A reaction that breaks down into smaller elements or compounds

14. Double Displacement
The elements in two compounds trade places

15. Single Replacement
A more active metal replaces a less reactive metal in a compound

16. Exothermic
Gives off heat

17. Endothermic
Takes in heat

18. Activation Energy
Just enough energy to start a reaction

19. Inhibitor
Something that slows down a reaction

20. Catalyst
Something that speeds up a reaction but doesn’t get used up