Transcript Forming Solids - Ms. Henry's Class Page

Forming Solids
Lesson 2
Metals are
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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
Natural
Synthetic (Man-made)
Do these look familiar?
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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.