1. Classification Of Matter

2. Pure Substances
A pure substance is an element or a compound. They have fixed & uniform compositions. Examples: Element: Copper (Cu) Compound: Quartz (SiO2) (A compound is a chemical combination of 2 or more elements)

3. Mixtures
A mixture is a physical blend of two or more substances which retain their own identity.
Heterogeneous mixture 
Homogeneous  mixture

4. Heterogeneous Mixture
Not evenly mixed
Particles not uniformly distributed
The particles keep their properties.
Each sample of the mixture will be different. (not uniform)
Easily separated

5. Heterogeneous Mixture Examples
Concrete
oil, water & beads
Salt and pepper

6. Homogeneous Mixture Particles are evenly mixed
completely uniform throughout
Each sample of the mixture is exactly the same.
Can be separated, but more work
also called a solution (note: solutions can be either gas, liquid, or solid)

7. Homogeneous Mixture Examples
Air Windex Gatorade
metal alloys:

8. Mixtures A mixture can be separated by physically:
Magnets, filter, distillation, evaporation, vaporization, chromatography

9. Classification Of Matter
Now practice on page 4

10. Introduction to The Periodic Table
Elements
Introduction to The Periodic Table

11. Elements the simplest form of matter cannot be broken down further
pure substances.
building blocks of all matter in the universe
on the Periodic Table

12. Symbols The symbol represents the element.
Usually the first one or two letters of the name, but some are Latin or German.
First letter is capitalized, the second letter is lower case.
Page 16 Table 2

13. Periodic Table
The key to understanding chemistry

15. The Periodic Table
The Periodic Table is the organization of known elements.
The current Periodic Table was organized by Henry Moseley.
Page 17 Figure 12

16. Rows are known as PERIODS - arranged by increasing atomic #1 2 3 4 5 6 7

17. Columns are known as GROUPS3B 4B 5B 6B 7B 8B 9B
10B
11B
12B

18. Columns are known as GROUPS8A 1A 2A 3A 4A 5A 6A 7A 8B 3B 4B 5B 6B 7B 1B 2B

19. elements in each group have similar physical & chemical properties
Groups or Families
elements in each group have similar physical & chemical properties
Representative Elements: 1a-8a (1,2 & 13-18)
represent all types of elements (S, L, & gas)
Transition elements: 1b-8b (3-12)
As you move from left to right across the middle of the table the elements transition from metals to nonmetals.
Inner Transition Metals: 2 rows at bottom
Rare earth metals & those not found in nature (man-made)

20. Periodic Table

21. Metals 80% of all elements, left side of Periodic Table
Physical Characteristics
Shiny—metallic luster
Malleable—able to be hammered, rolled, dented into thin sheets
Ductile—able to be stretched into fine wires
Tensile strength—able to resist breaking
Most are solid at room temperature (except mercury)
Good conductors of electricity and heat

22. Nonmetals 20% of elements, right side of Periodic Table
Characteristics
Brittle
Gases, except liquid bromine, solid iodine, sulfur selenium, phosphorus and carbon
Poor conductors of electricity and heat
HYDROGEN is a nonmetal

23. Metalloids properties of both metals & non metals
border both sides of the “stair stepping line” on the Periodic Table
Characteristics
Solids
Semiconductors of electricity
Used in desktop computers, digital watches, television and radios

24. Periodic Table Activity
Get 4 different colored pencils from the back and open your book to pg 17.
Use 1 color to color the inner transition metals on the bottom of the chart.
Then use the last 3 colors to color the metals, non metals and metaloids.
Make a key at the top of your chart.

25. Review Chapter 1-2
Exam Monday
Discuss study guide

26. Homework—Due Monday 9/21 Complete Periodic Table Activity
Matter and Change Review Worksheet
Exam Monday—Chapters 1-2