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Forming Solids

Forming Solids. Lesson 2. Metals are. Shiny Good Conductors of heat & electricity Solid at room temperature. Most of the periodic table Ductile – Can be pulled into a wire Malleable – Can be hammered or rolled into sheets. Metallic Bonds.

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Forming Solids

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  1. Forming Solids Lesson 2

  2. Metals are • Shiny • Good Conductors of heat & electricity • Solid at room temperature. • Most of the periodic table • Ductile – Can be pulled into a wire • Malleable – Can be hammered or rolled into sheets.

  3. Metallic Bonds • Metals bonds form when metals share their pooled electrons. • Metals can bond with the same element or with other metals. • Electrons move freely throughout the metal A “sea” of electrons

  4. Crystals • Crystal is a regular, repeating pattern of atoms, ion, or molecules. • Snowflakes, diamonds, salt are examples. • Each crystal has a unit cell.

  5. Unit Cells

  6. Polymers • Polymers are covalent compounds made up of many small, repeating units in a chain. • Poly – means “many”, -mer means “parts” • DNA is a polymer. • Monomers is the basic unit of a polymer.

  7. Polymer types Synthetic (Man-made) Natural DNA Proteins Carbohydrates (sugars) Fats Do these look familiar?

  8. How to make a crystals • Watch Short You Tube Demo • Fun recipes you can do at home!

  9. How to make a polymer – Silly Putty! • Be careful with borax, it is toxic – wear gloves and don’t breathe in fumes! • In one bowl, mix ¼ c. of borax and 1 c. of water. Stir • In another bowl, mix ¼ c. Elmer’s glue & ¼ c. water + some food coloring. Stir. • Now mix the two together. It will be slimy at first, then will solidify into silly putty.

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