3. Match each word with the definition:
1. Anything that occupies space and has mass.
2. A substance made of two or more elements.
3. Forms of an element with different numbers of neutrons.
4. The smallest amount of a substance.
5. A homogeneous mixture of one or more solutes dissolved in a solvent.
6. A substance into which another substance dissolves to form a solution.
7. A substance being dissolved in a mixture or solution.
8. A measure of acid/base of a substance.
9. A substance with excess H+ ions.
10. A substance with few H+ ions.
11. A carbon based substance in living systems.
12. A substance that does not contain carbon.
13. The basic element in organic compounds.
14. A substance that speeds up a chemical reaction.
15. A polysaccharide in plants that serves as building material.
A. acid
B. base
C. carbon
D. catalyst
E. compound
F. inorganic
G. isotopes
H. molecule
I. organic
J. pH
K. solute
L. solution
M. solvent
N. cellulose
O. matter