1. Do Now 9/22/14 Fe Cl Pb K Fluorine Beryllium Neon Mercury
What elements do the following chemical symbols represent?
Fe Cl Pb K
What is the chemical symbol for the following elements?
Fluorine Beryllium Neon Mercury
3. Look at your Metal vs Non-Metal notes from Friday.
a. Which of the #s 1-7 did you think was a metal?
b. Which of the #s 1-7 were magnetic?

2. Metals vs. Non-Metals

3. DO NOW:
Which of the samples in front of you do you believe to be metals?
Circle the numbers in the table (1-7) you think are metals.
Tell your partner Why/What observations help you to define these as metals?
Are there any tests you could perform to prove to yourself that these materials are metals? What tests? Circle the tests you could perform safely in your seat.

4. Many suggest a Magnet would confirm metal vs non metal
Label the 2nd row of the table “metallic?”
Use the magnet to test all 7 materials.
Record your results in the table
Discuss with your partner whether your results match your predictions.

5. Identification of materials
Aluminum
Magnesium
Cobalt
Iron
Carbon
Copper
Nickel

6. Another Test - Conductivity
Label the 3rd row of the table “conduct electricity?”
Test the conductivity meter by turning it on then touching the two prongs to a metal part of your desk or chair.
If it works, use it to test for ellectrical conductivity for each of the 7 materials.
Record your results in the table
Discuss with your partner whether your results match your original predictions.

7. Metals Good conductor of heat and electricity.
Most metals are room temp.
Most are malleable ( can be hammered or rolled into thin sheets).
Tend to be ductile (can be stretched into fine wire).
Copper
Gold
Sodium

8. Nonmetals Are poor conductors of heat and electricity.
Many are gases at room temp
(1) bromine is a liquid
The solid ones are brittle.
Chlorine
Bromine
Sulfur

9. Metalloids
Elements that has some characteristics of metals and some characteristics of nonmetals.
Found along the stair-step line separates the metals from non-metals on the P. T.
They are all solids and tend to be less malleable than metals but not as brittle as nonmetals
Silicon
Boron

10. Results
Magnets will NOT determine whether an unknown is a metal or a non-metal because some metals are not magnetic.
You CAN test the unknown for electric conductivity
Metals conduct, and the light on the meter turns on
Non-metals don’t conduct and the light stays off

11. Metals, Non-metals and Metalloids

12. Separation Lab Introduction

13. Physical Properties
A physical property is a characteristic that can be observed or measured without changing the identity of the substance.
EX: melting point
Boiling point
Is it magnetically attracted?
Does it float or sink on water?
Does it dissolve in water? (Soluble?)
Is it soft or hard?
Is it dull or shiny?
Does it conduct electricity?
Chemical properties – you must change the material to test (ie flammable)

14. Separation methods (separate mixtures according to physical properties)
Decanting (density)
Filtration (size of particle)

15. Vaporization (boil off liquid without collecting)
(different boiling points)
Chumbler - Properties of Matter

16. Physical Change Changes of state (freezing, boiling, condensing, etc)
Breaking a large sample into smaller samples
Dissolving into water

17. Other Techniques Add water and skim floating solid off top
(take out what floats based on density)
Use a magnet
(remove magnetic materials and leave non magnetic materials behind)

18. Centrifuge (density)

19. Chromatography (polarity)
Distillation Keeps all materials- unlike vaporization
(boiling point)