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9 Cards in this Set
- Front
- Back
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Five three examples of substances with a giant covalent structure |
Silicon dioxide, graphite, diamond |
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explain why these substances have very high melting point s |
Because the atoms are bonded together by very string bonds |
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Explain why diamond is very hard |
Because of its rigid structure and the four covalent bonds |
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explain why graphite is soft and slippery |
because each carbon atom only forms three covalent bonds so these layers are free to slide over each other |
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explain why graphite is a good conductor of heat and electricity |
because each carbon atoms has a free electron which can be charged and conduct heat and electricity |
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what is fullerene |
fullerenes are tiny hallow tubes of carbon which can be joined together to form nanotubes |
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give four uses or fullerenes |
delivery medicine into the body, reinforcing tennis rackets, lubricants, catalysts |
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what are the similarity between graphite and metallic structure |
they both have sea of electrons, they both have weak bonds between particles allowing their shapes to easily change, they both have high boiling and melting points |
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which regular shape can be found in all fullerenes |
hexagonal rings |
