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Lesson 1-2

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

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  1. Lesson 1-2 What are Metals?

  2. 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

  3. 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

  4. 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

  5. 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

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