GCSE AQA Unit 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Do giant ionic structures have high or low melting points? | High-they have strong bonds
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| Can giant ionic structures conduct electricity? | When dissolved or molten because the ions separate and are free to move
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| Do simple molecular substances have high or low melting points? | Low because the inter-molecular forces are very weak
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| Can simple molecular substances conduct electricity? | No because they have no free electrons and there are no ions
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| Do giant covalent structures have high or low melting points? | High-strong covalent bonds
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| Can giant covalent structures conduct electricity? | No-they are insoluble in water but do not even conduct when molten
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| Do metallic structures have high or low melting points? | High-they have a giant structure
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| Can metallic structures conduct electricity? | Yes-they have electrons that are free to move
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| Why are metals malleable? | The metals have layers which can easily slide over each other
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| Why can graphite and buckminster fullerene conduct electricity even though they are covalent structures? | Each carbon atom only forms three covalent bonds, this leaves each carbon atom with a free electron which can conduct electricity
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| What is the structure of graphite? | Graphite structures are arranged in layers, with inter-molecular forces between the layers
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| What is the structure of buckminster fullerene? | Spherical, football shape
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| What is the structure of diamond? | It is a giant covalent structure made of carbon in which each carbon atom forms four covalent bonds
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| What is the structure of silicon dioxide? | It is a giant covalent structure made of silicon and oxygen
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Marge-Homer
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