Chemistry - Bonding

Card 1.) Physical Properties of Ionic Compounds

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  • Created by: Aphrita
  • Created on: 08-06-09 19:07

Physical Properties of Ionic Compounds

  • Solids at room temperature
  • High melting points
  • Soluble in water
  • Insoluble in organic solvents (eg. petrol)
  • Hard solids
  • Brittle solids
  • Insulators in the solid state
  • Conductors in the liquid state
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Valency

The valency of an atom can be worked out using it's group no.

The valency of an atom is equal to:

1.) The number of charges of the ion that the atom will form.

2.)For covalent bonds, the number of covelant bonds that the atom will form.

Group No. - Valency

1 -------------1

2--------------2

3--------------3

4 -------------4

5 -------------3

6 -------------2

7------------- 1

8------------- 0

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Valency Continued

Group No. - Valency

7------------- 1

8------------- 0


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Physical Properties of Covalent Compounds

  • Can be solids, liquids or gases at room temperature
  • Low melting points when solid
  • Low boiling points when liquid
  • Insoluble in water
  • Soluble in organic solvents (eg. petrol)
  • Insulators in all states
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