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Lesson 1-2. What are Metals?. I. Metals and Nonmetals A. Metals – 1. conductors of electricity (passes through) 2. conductor of heat (heats easily) 3. malleable (shapeable) 4. ductile (can be made into wire) 5. grouped together on Periodic Table

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lesson 1 2
Lesson 1-2

What are Metals?

slide2

I. Metals and Nonmetals

A. Metals –

1. conductors of electricity (passes through)

2. conductor of heat (heats easily)

3. malleable (shapeable)

4. ductile (can be made into wire)

5. grouped together on Periodic Table

a) left side & middle (except H)

6. use scanning tunneling microscope to see atoms on the surface of metals

slide3
B. Nonmetals

1. insulators - not good conductors of electricity

2. not good conductors of heat

3. not malleable - cannot be shaped

4. usually brittle (break), or not solid

slide4
C. Alloys

1. metals that are not pure elements

2. made by combining metals together or a metal and a nonmetal

3. have more useful properties than the elements that make them

4. Ex: Tin and Copper together make Bronze – harder, stronger, doesn’t corrode

5. most common in steel alloys: iron

a. not very hard

b. when carbon is added – much stronger

slide5

D. Metalloids

1. have some but not all the characteristics of metals

2. also known as semiconductors (in computers, mp3 players, etc)

3. most common: silicon

a. shiny – not as strong as a metal

b. breaks when you hit it

c. conducts electricity – not as well as other metals – can be controlled