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 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

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

Unit Cells

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.

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

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

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.