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Understanding Metals, Nonmetals, and Alloys

This lesson explores the properties and characteristics of metals, nonmetals, and alloys, including their conductivity, malleability, and uses. Learn about metalloids and how they exhibit traits of both metals and nonmetals. Discover the significance of alloys in enhancing material properties.

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Understanding Metals, Nonmetals, and Alloys

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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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