Properties of metals/molecules

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  • Created by: Harry
  • Created on: 21-04-14 16:42
What are the properties of simple molecules?
Low melting and boiling points, do not conduct electricity (no charged particles)
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Are the forces between atoms in a covalent bond strong or weak?
They are strong
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Are the forces between molecules in a covalent substance strong or weak?
They are weak
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What are allotropes?
Different forms of the same chemical element
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What are the properties of Diamond?
Very high melting/boiling point, made up entirely of Carbon, each Carbon atom is bonded by strong covalent bonds to four other atoms in a tetrahedral arrangement
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What are the properties of Graphite?
Has a layer structure, made up of hexagons, each Carbon atom is covalently bonded to three other Carbon atoms, high melting/boiling point, weak bonds between layers
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What are the properties of metals?
Conduct electricity, conduct heat,
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What are alloys?
A mixture of metals (eg. Brass is a mixture of Copper and Zinc).
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How can Graphite conduct electricity?
Each Carbon atom is bonded to three other Carbon atoms with one electron left over (not used in bonding). These electrons are known as delocalised electrons and allow graphite to conduct electricity.
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Why can't Diamond conduct electricity?
No spare electrons (all used in bonding)
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What do metals exist as?
Giant metallic structures
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Why can metals conduct heat?
The delocalised electrons are allowed to move & transfer kinetic energy from the hot end to the cold end of the metal.
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What are the properties of Ionic Compounds?
High melting/boiling points, exist as crystal structures, brittle, dissolve in water, conduct electricity
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Other cards in this set

Card 2

Front

Are the forces between atoms in a covalent bond strong or weak?

Back

They are strong

Card 3

Front

Are the forces between molecules in a covalent substance strong or weak?

Back

Preview of the front of card 3

Card 4

Front

What are allotropes?

Back

Preview of the front of card 4

Card 5

Front

What are the properties of Diamond?

Back

Preview of the front of card 5
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