C4g: Metal Structure and Properties

Metals are a very important class of materials. This item relates the properties of metals to their structure. The item also includes information on superconductors. There search and data interpretation activities allow the analysing and interpretation of scientific information and the collection of secondary data using ICT. 

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Which is iron used to make? Why?
Cars and bridges because it is hard with a high tensile strength
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Which is copper used to make? Why?
Electrical wiring because it is a good conductor of electricity.
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Give eight physical properties of metals.
High melting point, lustrous (shiny), high density, hard, good conductor of electricity, high boiling point, high tensile strength(resist being stretched) and good conductor of heat.
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What property does the base of a saucepan need?
To be a good conductor of heat.
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How are particles in a metal held together?
By a metallic bond.
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What can some metals be at low temperatures?
Superconductors.
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Why do metals have high boiling and melting points?
Because of strong metallic bonds.
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Describe how metals conduct electricity.
Metals contain electrons that are free to move in the metal structure, carrying charge from place to place and allowing metals to conduct electricity well.
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What is metallic bonding?
The strong attraction between a sea of delocalised electrons and close packed positive metal ions.
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Explain why - in terms of structure - metals can conduct electricity.
The delocalised electrons are able to move through the metal structure. When a potential difference is applied, they will move together, allowing an electric current to flow through the metal.
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Explain why - in terms of structure - metals have high melting and boiling points.
The attraction between metal ions&delocalised electrons must be overcome to melt/boil a metal.Some of the attractions must be overcome to melt&all must be overcome to boil.These attractive forces are strong,so metals have high melting&boiling points
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What is a superconductor?
A metal with little or no electrical resistance at very low temperatures.
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Give three potential benefits of superconductors.
Power transmission without losses, Super fast electronic circuits and Powerful electromagnets.
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Other cards in this set

Card 2

Front

Which is copper used to make? Why?

Back

Electrical wiring because it is a good conductor of electricity.

Card 3

Front

Give eight physical properties of metals.

Back

Preview of the front of card 3

Card 4

Front

What property does the base of a saucepan need?

Back

Preview of the front of card 4

Card 5

Front

How are particles in a metal held together?

Back

Preview of the front of card 5
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