CH2 Solid Structures

This resource covers the basic information needed on topic 5 of CH2 WJEC.

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What is the Crystal coordination number?
The number of anions around each cation in an ionic lattice.
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What is the crystal coordination number for CsCl?
8:8
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What is the crystal coordination number for NaCl?
6:6
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List the main differences between Diamond and Graphite
In diamond the Carbon bonds to four other carbons. In Graphite the carbon bonds to three other carbons. Diamond forms a tetrahedral shape. Graphite forms a trigonal planar shape, and forms layers. Graphite can conduct electricity Diamond can't.
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Metallic stucture
An arry of positive anions that are formed by giving an electron the sea of delocalized electrons that surround the anions.
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Carbon Nanotubes
Have a diameter of about 1nm and a length millions of times greater. A singe layer of graphite rolled into a cylinder. Can be good conductors of heat and electricity, used in engineering clothing and fuel and solar cells.
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Smart Materials
Properties change depending on conditions applied, such as pH, stress and temperature. Example include Photochromic and thermochromic materials used in sunglasses and strip thermometers.
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Properties of giant ionic structures?
Hard, brittle and have a high melting temperature. Can only conduct electricity on aqueous state as there is no free electron in the solid state. Solubility depends but most ionic chlorides are soluble.
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Properties of giant covalent structures?
They have a very high melting point and are insoluble in water.
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Properties of carbon nanotubes?
They are among the strongest and stiffest materials known.
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Other cards in this set

Card 2

Front

What is the crystal coordination number for CsCl?

Back

8:8

Card 3

Front

What is the crystal coordination number for NaCl?

Back

Preview of the front of card 3

Card 4

Front

List the main differences between Diamond and Graphite

Back

Preview of the front of card 4

Card 5

Front

Metallic stucture

Back

Preview of the front of card 5
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