Chemistry- bonding, structure and properties

How are ionic compounds arranged in giant ionic structures?
In giant lattice structures
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What melting point and boiling point do giant ionic structures have?
High melting point and a high boiling point
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Why?
The strength of the electrostatic forces of attraction between oppositely-charged ions
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Why is it a lattice?
It's arranged regularly
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Why is it giant?
The arrangement is repeated many times with large amounts of ions
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What do ionic compounds usually form?
Crystals
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Overall charge of a sample of an ionic compound?
Zero
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What must happen for ionic substance to conduct electricity?
Ions must be free to move to carry charge from place to place
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When are ions free to move? When can't they move?
When it's molten liquid or in a solution. It cannot move when it is a solid
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What is the melting point difference between sodium chloride and magnesium oxide?
The melting point is lower because it has weaker ionic bonds to break/overcome
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What are the two reasons for this?
Sodium chloride has fewer charges and the ion want are larger so they can't get closer to the negatively charged ions
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What do simple molecular structures consist of?
Small atoms joined together by covalent bonding
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What are the bonds binding the atoms together like?
Very strong. However, the intermolecular bonds are weak
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What temperature is needed to separate the structure?
Low temperature to separate the weak forces
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Do simple molecular strives conduct electricity?
No because they have no free electrons to move around and create electricity and carry an electrical current
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What do giant covalent structures contain?
Non-metal atoms joined to adjacent atoms by covalent bonds
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How are giant covalent structures arranged?
In a giant lattice
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What strength is the structure?
Strong because there are many bonds involved within the structure
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What is the melting point and why?
Very high because a lot of strong covalent bonds must be broken
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Other cards in this set

Card 2

Front

What melting point and boiling point do giant ionic structures have?

Back

High melting point and a high boiling point

Card 3

Front

Why?

Back

Preview of the front of card 3

Card 4

Front

Why is it a lattice?

Back

Preview of the front of card 4

Card 5

Front

Why is it giant?

Back

Preview of the front of card 5
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