1. Classifying Matter

2. Matter
Can be divided into
Pure Substances & Mixtures

4. Substances Either an Element or a Compound
CANNOT be broken down into simpler components and still maintain the properties it had originally

6. Element A substance in which all atoms are alike
Represent with Chemical Symbol
All known elements found on Periodic Table

7. Uses of Some Elements
Aluminum- can be used as a blanket because it reflects radiation (a form of heat)
Americium- used in smoke detectors- radioactive
Tungsten- very high melting point- used in lightbulb filaments
Titanium- very lightweight and strong metal- used in frames for airplanes and in engines
Lead- high density- makes it a good barrier for radiation- blocks particle movement

8. 2. Compounds
Substance in which the atoms of two or more different elements are combined in fixed proportions
(represent by chemical formula)
Elements bond to form compounds
Cannot be separated by physical means

9. Classifying Matter: Element or Compound?
Element - Atom
S8 ?
Element- Molecule
H2O ?
Compound
Cl2 ?
H2O2 ?

10. Mixture
Made up of two or more substances- can be separated by physical means
Not a fixed amount of components

12. Heterogeneous
Made of materials that can be distinguished from each other
Not uniform in composition

13. Homogenous
Contains two or more gaseous, liquid, or solid substance blended evenly throughout
Looks same throughout

15. Solution
Homogeneous mixtures containing particles so small they cannot be seen with a microscope and will never settle to the bottom of the container (Dissolves)
tap water, salt water, food coloring and water, colas, vinegar

16. Mixture - Solution
Pure Substance - Compound

18. Colloid Heterogenous Mixture with large particles that never settle
fog, smoke, ink, glue, milk, cream, butter

19. Colloid vs. Solution Pass a beam of light through the mixture
If the beam is invisible- it is a solution
If the beam is visible- it is a colloid
The visible beam through the colloid is called the Tyndall effect

20. Tyndall Effect

21. Tyndall Effect

22. Suspension
Heterogeneous mixture containing a liquid in which visible particles settle out over time
like dirty water

25. How can you tell the difference between Mixture and Compound?
Mixture can be separated physically and keep its properties
Compound can only be separated chemically and does NOT keep its properties

26. How can you tell the difference between Mixture and Compound?