What is an ionic compound?
A compound containing positive and negative ions, held together by electrostatic attraction.
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Describe the structure of an ionic compound.
Ionic compounds have a giant ionic lattice structure. The ions form a closely-packed regular lattice arrangement, with strong electrostatic forces of attraction between oppositely charged ions, in all directions.
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What is a ball and stick diagram?
A ball and stick diagram is way of representing molecules or compounds, in which the atoms (or ions) are represented by balls, and bonds are represented by lines or sticks between them.
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Why are ball and stick diagrams not realistic?
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What are the properties of ionic compounds?
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Why do ionic compounds have high melting and boiling points?
The strong ionic bonds (electrostatic forces of attraction) between the oppositely charged ions require a lot of energy (and therefore high temperature) to break.
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When do ionic compounds conduct electricity, and why?
Ionic compounds only conduct electricity when molten or aqueous, but not when solid.
This is because substances need charged particles that are free to move in, order to conduct electricity. When ionic compounds are solid, their ions are in a fixed lattice, so can’t flow. However, when molten or aqueous, the ions are free to move and carry charge.
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