Covalent Bonding and Substances

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  • Created by: iona.fl
  • Created on: 03-06-16 09:31
What is the Formation of a covalent bond?
The sharing of a pair of electrons between two atoms
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What makes the two atoms bond?
A strong attraction between the bonding pair of electrons and the nuclei of the atoms involved.
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Simple Molecular structures have what boilings points?
Low
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Why do simple molecular structures have this boling point?
The bond between the molecues has relativley weak forces: the intermolecular forces between simple molecules are weak.
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Name the other property of Simple molecules and why?
Do not conduct electricity - this is because they do not have any free electrons or an overall electric charge.
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Explain the high melting/boiling points of substances with giant covalent structures.
Lots of energy is needed to break many strong covalent bonds
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When does a Covalent bond form?
When two non-metal atoms share a pair of electrons.
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What sort of elements are involved in covalent bonding?
Non-metals
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What are giant covalent structures arranged in?
giant regular lattices - extremely strong structures because of the many bonds involved.
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Name two properties of Giant covalent structures
Very high melting points – this is because a lot of strong covalent bonds must be broken which requres a lot of energy Variable electrical conductivity - diamond does not conduct electricity, whereas graphite contains free electrons so it does.
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What is one use of Graphite and why?
pencils, because each layer of graphite does not have a strng bond meaning that layers easily slide off.
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What is one use of Diamond and why?
Drill bits, because the bonds between each atom in the lattice are very strng making diamond very strong
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Other cards in this set

Card 2

Front

What makes the two atoms bond?

Back

A strong attraction between the bonding pair of electrons and the nuclei of the atoms involved.

Card 3

Front

Simple Molecular structures have what boilings points?

Back

Preview of the front of card 3

Card 4

Front

Why do simple molecular structures have this boling point?

Back

Preview of the front of card 4

Card 5

Front

Name the other property of Simple molecules and why?

Back

Preview of the front of card 5
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