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7 Cards in this Set
- Front
- Back
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What are allotropes? |
Allotropes are the different forms of the same element. |
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What are allotropes of Carbon? |
- Diamond - Graphite - Fullerence |
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Describe the type of bondings in Diamond. |
Diamond is a covalent network substance. Each carbon atom is at the centre of a regular tetrahedron surrounded by four others at each corner. |
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Describe the type of bonding in Graphite. |
The carbon atoms of Graphite are arranged in 'flat parallel layers'. Each carbon atom is 'covalently' bonded to three other atoms in a 'hexagonal' arrangement. |
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Why does Graphite conduct electricity? |
Because it has one free moving electron. It only uses three of its four valence electrons to form covalent bonds. |
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Why doesn't diamond conduct electricity? |
Because diamond has no free electron as each carbon uses all four valence electrons |
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Describe the properties of Graphite that enables it to be used as lead pencils. |
The structural layers have weak bonds between each layers. This allows it to slide over each layer easily. |
