Ionic Compounds

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  • Created by: joshd
  • Created on: 30-03-14 10:50
What do 'dot and cross' diagrams show?
What happens to the electrons in ionic bonds.
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Describe what would happen with the example of Sodium Chloride (NaCl)
The sodium atom gives up its outer electron, becoming an Na+ ion. The chlorine atom picks up the electron, becoming a Cl- (chloride) ion.
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Describe what would happen with the example of Magnesium Oxide (MgO)
The magnesium atom gives up its two outer electrons, becoming an Mg2+ ion. The oxygen atom picks up the electrons, becoming an O2- (oxide) ion.
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Describe what would happen with the example of Sodium Oxide (Na2O)
Two sodium atoms give up their outer electrons, becoming two Na+ ions. The oxygen atom picks up the two electrons, becoming an O2- ion.
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Describe what would happen with the example of Calcium Chloride (CaCl2)
The calcium atom gives up its two outer electrons, becoming a Ca2+ ion. The two chlorine atoms pick up one electron each, becoming two Cl- (chloride) ions.
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What is the result when ionic compounds work in this way?
All the atoms end up with full outer shells as a result of this giving and taking of electrons.
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What do ionic bonds always produce?
Compounds with similar structures.
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What do the ions from? Why?
A closely packed regular lattice arrangemnt. This is because ionic bonds are very strong electrostatic forces of attraction between oppositely charged ions.
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What do ionic compounds all have? Give examples.
Ionic compounds, like sodium chloride and magnesium oxide, all have similar properties caused by their structure.
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Why do ionic compounds have high melting and boiling points?
This is due to the very strong bonds between the ions. It takes a lot of energy to break these bonds.
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Why do ionic compounds conduct electricity when aqueous or molten?
When in aqueous solution (dissolved), the ions separate and are all free to move, so they'll carry electric current. The same happens when they melt - the ions are free to move and they'll carry electric current.
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Other cards in this set

Card 2

Front

Describe what would happen with the example of Sodium Chloride (NaCl)

Back

The sodium atom gives up its outer electron, becoming an Na+ ion. The chlorine atom picks up the electron, becoming a Cl- (chloride) ion.

Card 3

Front

Describe what would happen with the example of Magnesium Oxide (MgO)

Back

Preview of the front of card 3

Card 4

Front

Describe what would happen with the example of Sodium Oxide (Na2O)

Back

Preview of the front of card 4

Card 5

Front

Describe what would happen with the example of Calcium Chloride (CaCl2)

Back

Preview of the front of card 5
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