Investigation 6 Vocabulary

3. A single compound breaks down into two or more simpler products.
4. A scale that ranges from 0 to 14, indicating how acidic or basic a substance is.
6. A positively charged ion (has less electrons than it should).
8. One element replaces another in a compound.
9. A chemical reaction where an acid and a base react to form water and a salt.
10. The reactant that is used up first in a chemical reaction, thereby determining the amount of product formed.
12. The anions and cations of two different compounds switch places.
13. A negatively charged ion (has more electrons than it should).
15. A chemical reaction that releases energy.
18. The ending substances in a reaction.
19. A substance that has a pH greater than 7 and releases hydroxide (OH-) ions when dissolved in water.
20. A process in which one or more substances are changed into new substances with different properties.

1. A way to represent a chemical reaction using symbols and formulas.
2. Two substances come together and react to form one substance.
5. A law that implies that mass can neither be created nor destroyed.
7. The starting substances in a reaction.
11. A substances that has a pH of less than 7 and releases hydrogen ions (H+) when dissolved in water.
14. A substance combines with oxygen, releasing energy in the form of light or heat.
16. A chemical reaction that absorbs energy.
17. The reactant that remains after the limiting reactant is completely consumed.