1. The Elements (Section 1.3) Dr. C.’s Pre-AP Chemistry Lake Dallas High School Fall 2015

2. Lesson Objectives (Sept. 8 th - A Day, Sept 9 th - B Day)  Use a periodic table to find names or symbols of elements  Define group, family, period and metalloid  Describe the four regions of the periodic table and their properties

3. Elements with Symobls you wouldn’t expect The first letter of an element is capitalized, the second letter is not. Example: If you mean copper you should write Cu, because writing CU is two different elements. C = Carbon U = Uranium

4. Groups vs. Periods  Group: A vertical column of the periodic table.  Also called a family  Each group (family) contains elements with similar chemical properties.  Period: The horizontal columns across the periodic table.

5. Periodic Table of The Elements

6. Properties of Metals  Metals are good conductors of electricity and heat.  Most metals are solid at room temperature  Most metals can be malleable (Can be hammered or rolled into sheets)  Most metals are ductile (can be made into wire)

7. Properties of Non-Metals Non-metals are poor conductors of electricity and heat. Many are gases Solids are brittle (easily broken apart)

8. Properties of Metalloids Metalloids share characteristics of both metals and non- metals. They are considered semiconductors of electricity They are solid at room temperature Aluminum is NOT a metalloid even though it touches the line.

9. Noble Gases Noble Gases are located in group 18 of the periodic table. Generally chemically unreactive As the name states – Gases at room temperature

10. Lesson Objectives (Sept. 8 th - A Day, Sept 9 th - B Day)  Use a periodic table to find names or symbols of elements  Define group, family, period and metalloid  Describe the four regions of the periodic table and their properties