1. Classification of Matter
Unit 9 Lecture 1

2. Matter Has mass (different than weight which is mass due to gravity)
Occupies space
Volume and weight are unreliable quantities
Temperature affects volume
Weight changes with location (higher the elevation, weight is less because less gravity)

3. Element Pure substance Cannot be separated into simpler substances
Made of same type of atoms
Only one symbol from a periodic table
Cannot be separated into simpler substances
always has same properties as another pure sample
Example: copper wire

4. Element Activities
Click on my webpage links under Chemistry and choose Periodic Table Elements and Games.
Naming elements
Naming Symbols

5. Compound Made of two or more different elements chemically combined
More than one symbol from the periodic table
Example: H2O

6. Properties of a compound differ from those of the elements that it is made up from
Water: liquid at room temperature; puts out fires
Hydrogen: gas at room temperature; flammable
Oxygen: gas at room temperature; flammable

7. 3. Mixtures consist of parts that have different properties
Consists of two or more substances that each retain their own individual properties
3 ways formed:
2 or more elements mixed together
Mixture of copper and nickel coins
A compound and element mixed together
2 or more compounds mixed together
Mixture of sugar and salt

8. Properties of Mixtures
Mixture retains properties of each of the different parts of the mixture
Composition of mixture varies
Example: Bag of fruit snacks

9. Types of Mixtures Homogenous
sample from one part of mixture has the same composition as a sample from any other part of the mixture
Example: Ketchup, perfume, shampoo

10. Solutions Homogenous mixture 2 parts: Example: Salt water
Solute: substance that gets dissolved
Solvent: substance in which the solute gets dissolved
Example: Salt water
Salt = solute
Water = solvent

11. Heterogeneous
Sample of matter that has parts with different compositions
Throw salt on top of sugar – not equal composition throughout mixture
Example: italian dressing