1. Classification of Matter
A quick review

2. Matter
Anything that has mass and occupies space

3. Matter can be classified 2 ways
Pure Substances
Mixtures

4. Pure Substances Contains one type of substance
Has a fixed uniform composition
Has the same properties
Two types of pure substances
Elements
Compounds

5. Elements Contain only one type of atom
Can not be readily broken down into simpler substances
Atoms have known properties

6. Compounds Two or more elements chemically combined
Can not be separated by a physical process
The elements are joined together in a fixed ratio
Have know properties

7. A slight difference
A molecule is a substance that has two or more atoms bonded together.
The can be atoms of the same element
Elemental oxygen exists as a molecule, O2
Compounds are two ore more different elements combined in a fixed ratio.

8. Mixtures Mixtures do not have fixed composition
Mixtures do not have set physical properties
Mixtures can be separated by a physical process into component parts
Filtering
Distilling
Manually

9. Heterogeneous Mixtures
In a Heterogeneous mixture the parts are different from each other
One area is different than another

10. Homogeneous Mixtures Contain more than one type of substance
The substances are evenly distributed - the same throughout

11. Specific types of Mixtures
Solutions
Solutes dissolved in a solvent
Homogeneous with small particles
Colloids
Heterogeneous with intermediate particle size
Exhibits the Tyndall effect
Suspensions
Heterogeneous with large particles