NOTES: CRYSTALS AND POLYMERS

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Presentation transcript:

NOTES: CRYSTALS AND POLYMERS SPECIAL TYPES OF SOLIDS

What is the definition of a CRYSTAL? Particles arranged in a regular and repeating pattern.

What do the lines represent in the picture of salt CRYSTAL particles below? The lines represent where the particles touch. In reality, the particles look like the picture on the right. Scientists just draw lines so you can see the chemical bonds better.

What are 3 properties of CRYSTALS? 1. Repeating Pattern 2. 3-D Geometric Shape 3. Brittle and Rigid

What are some examples of CRYSTALS? Rock Candy (sugar)

What are some examples of CRYSTALS? Quartz

Quartz Crystals in Mexico

What are some examples of CRYSTALS? Diamond and other gemstones

What are some examples of CRYSTALS? Snowflakes and ice

What is the definition of a long-chain POLYMER? Small particles attached in chains. They do not break as easily as crystals, especially when the chains criss-cross.

What do the long chains in POLYMERS look like and how are they connected? They are connected by bonds.

What are 2 properties of long-chain POLYMERS? 1. They are arranged in long chains. 2. Flexible and stretchy

What are some examples of long-chain POLYMERS? Gum

What are some examples of long-chain POLYMERS? DNA

What are some examples of long-chain POLYMERS? Fat (triglycerides)

What are some examples of long-chain POLYMERS? Plastic

More examples of polymers… Styrofoam Rubber Mylar balloons Nylon

Tomorrow… We are going to make some crystals!