1. PS.2b Compounds

2. Compounds are made of 2 or more kinds of atoms which combine in a specific ratio.

3. --A molecule is the smallest unit of a compound.

4. --Its atoms are chemically bonded so that the molecule does not behave like the elements which make it up.

5. --Its abbreviation is called a formula.

6. --Its abbreviation is called a formula. --Example: The smallest unit of water is made of 2 atoms of hydrogen and 1 atom of oxygen.

7. Examples of compounds:

8. Organic compounds are a special type of compounds. They all contain carbon.

9. Organic compounds are a special type of compounds. They all contain carbon. All other compounds are called inorganic compounds.