Chemistry unit 2 BONDING

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  • Created by: Lucycp101
  • Created on: 29-11-15 12:03
What is ionic bonding?
A chemical bond between a metal and a non metal
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Do you transfer or share electrons?
Ionic bonding involves transferring electrons
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What chemical substance is made through ionic bonding?
A compound: A substance where the atoms of two or more elements are chemically combined
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What is it called when an atom gets a full outer shell?
A noble gas configuration
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What happens to the atoms when transferring occurs?
They become ions with a particular charge
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What type of structure does ionic bonding create and why?
A giant ionic lattice because the arrangement is regular and is repeated many times with large numbers of ions.
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What force does the two opposite charges create?
An electrostatic attraction
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What do atoms in group 1,7 and 0 all do in their particular group?
Atoms in group 1 form ions with a charge +1. Atoms in group 7 form ions with a charge -1. Group 0 is unreactive
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What is covalent bonding?
A chemical bond between non metal atoms
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Do you share or transfer electrons in covalent bonding?
Covalent bonding involves sharing electrons
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What two structures does covalent bonding produce?
Produces simple molecular compounds and giant covalent structures
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How strong is the bond between the two atoms?
Very strong
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What force is formed between the two atoms
An electrostatic force of attraction
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Name properties of giant covalent structures
They have a very high melting point and boiling point, this is because the covalent bond between the atoms are so strong. Layers of the structure have weak intermolecular forces of attraction making it easy for the layers to slide over each other
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What is the substance like when the layers are weak?
Soft and slippery
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Why do the majority of giant covalent structures conduct heat and electricity?
This is because many of the atoms have free de localised electrons. The electrons can therefore absorb the kinetic energy and pass it on faster to other atoms. This is the same with electricity
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What type of weak force do the layers contain?
A weak intermolecular force of attraction
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What is metallic bonding?
Bonding between metal atoms
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What happens to the atoms in the bond?
The electrons on the outermost shell delocalise. This makes the atom turn i
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Why do the positive ions stay bonded if each ion is positive?
They are surrounded by negative electrons. The electrons therefore attract the positive ions creating a strong electrostatic attraction.
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How are chains arranged in thermosoftening polymers?
They are tangled and not in a regular structure making it easy for the chain to be seperated
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How are chains arranged in thermosetting polymers?
They are neatly arranged and contain covalent bonds
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Can thermosetting polymers be melted, remoulded or recycled?
They will burn before they melt meaning they don't melt. This is because they contain very strong covalent bonds. They cant be remolded because they dont melt. They can be recycled because they do not melt.
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Can thermosoftening polymers be melted, remoulded or recycled?
They can be melted easily, a low amount of heat energy is needed. They can be remoulded because they can be melted. They can be recycled because they can melt.
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What is a reversible reaction?
A reaction when the product produced by the reactants can react to form the original reactants again
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Is there any heat energy lost?
No heat energy is lost through the transfers
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Other cards in this set

Card 2

Front

Do you transfer or share electrons?

Back

Ionic bonding involves transferring electrons

Card 3

Front

What chemical substance is made through ionic bonding?

Back

Preview of the front of card 3

Card 4

Front

What is it called when an atom gets a full outer shell?

Back

Preview of the front of card 4

Card 5

Front

What happens to the atoms when transferring occurs?

Back

Preview of the front of card 5
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