1. G. Mixtures
Mixture
Combination of 2 or more pure substances that are not chemically combined
Substances are held together by physical forces, not chemical
NO CHEMICAL CHANGE TAKES PLACE
Each item retains its properties in the mixture
They can be separated physically

2. Can be classified as: Heterogeneous mixture Homogeneous mixture
G. Mixtures Cont.
Can be classified as:
Heterogeneous mixture
Homogeneous mixture

3. H. Heterogeneous v. Homogeneous
Heterogeneous Mixture
A mixture that does not blend smoothly throughout
Example:
Sand mixed with water, soup
Homogeneous Mixture
A mixture that has constant composition throughout
Homogeneous mixture = SOLUTION
Salt dissolved in water, Gatorade

4. Homogeneous or heterogeneous mixture?
Check
Homogeneous or heterogeneous mixture?
Vinegar
Iron filings in sand
Chicken noodle soup
Muddy water

5. I. Elements v. Compounds Element List 5 elements that you recognize
A pure substance that cannot be separated into a simpler substance by physical or chemical means.
List 5 elements that you recognize

6. I. Elements v. Compounds Cont.
Combination of two or more different elements that are combined chemically
Made of elements in a specific ratio that is always the same
Has a chemical formula
Can only be separated by chemical means, not physically
H2O
NaCl
CO2

7. Element or Compound? Neon (Ne) Water (H2O) Salt (NaCl)
Check
Element or Compound?
Neon (Ne)
Water (H2O)
Salt (NaCl)
Carbon Dioxide (CO2)
Sulfur (S)

8. CLASSIFICATION OF MATTER
changes
changes

9. CLASSIFICATION OF MATTER
Pure Substances
Physical
changes
Mixtures
Chemical
Heterogeneous mixtures
Homogeneous mixtures
Elements
changes
Compounds