1. Chemistry Unit 2 Classification of Matter
Matter – Anything that has mass and takes up space

2. Matter

3. Matter
Pure Substances
Mixtures

4. Matter
Pure Substances
Mixtures
Elements
Compounds

5. Matter
Pure Substances
Mixtures
Elements
Compounds
Homogeneous
Heterogeneous

6. Pure Substances
Made of only one type of matter.

7. Mixture Two or more types of matter physically combined.
No definite ratio of particles.

8. Elements Made of only one type of atom.
A complete list of all elements can be found on the Periodic Table.

9. Compounds
Atoms of two or more elements, chemically combined in a definite ratio.

10. Homogeneous Mixtures
Atoms of two or more elements, physically combined in no definite ratio.
The same throughout.
Must be a SOLUTION
A solute dissolved in a solvent.

11. Heterogeneous Mixture
Two or more types of atoms, physically combined in no definite ratio.
Different throughout.

12. Classification of Mixtures
Suspension – heterogeneous mixture; large particles. Ex. Snow globes, muddy water
Colloid – heterogeneous mixture; small particles. Ex. Milk, butter, salad dressing
Solution – homogeneous mixture; particles have dissolved. Ex. Saline, Kool Aid, Sweet tea

13. Tyndall Effect
Light cannot be seen unless it reflects off of a surface.
If you shine a beam of light through a mixture and the beam is visible, there must be particles in the mixture there to reflect the light.
Suspensions and Colloids give a positive Tyndall Effect. Solutions do not.

14. Suspension
Particles are usually large enough to be seen with the naked eye.
Particles will settle out if allowed to stand.
Particles can be removed if passed through a filter paper.
Particles will cause a positive Tyndall Effect.

15. Colloid Particles are usually too small to be seen with the naked eye.
Particles will not settle out of the mixture.
Particles will pass unchanged through the pores of the filter paper.
Particles will cause a positive Tyndall Effect.

16. Solution Particles are dissolved.
Will not settle out if allowed to stand.
Will not separate when filtered.
Will not cause a positive Tyndall Effect.

17. Physical Properties Describe the physical attributes of matter.
Examples: color, shape, size, texture, density, temperature, state or phase, smell, taste, boiling/melting/freezing points, magnetic attraction, solubility.

18. Physical Change
A change in one of the physical attributes of a sample of matter.
Does not change the chemical composition of the matter.

19. Chemical Properties
Describes the way a sample of matter reacts in the presence of other matter.
Examples: Oxidation, Corrosion, Hydrolysis,
Combustion, Flammability, Reaction to Acid
or Base.

20. Chemical Change
A change in the chemical composition of a sample of matter.
Always produces a new substance with new properties.