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20 Cards in this Set
- Front
- Back
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Structure of diamond |
Each C atom is bonded to 4 other C atoms to form a continuous regular lattice |
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Structure of graphite |
Soft and slippery Can conduct electricity • Due to not every electron being bonded, there are some that are free to move • Each C atom is bonded to 3 other C atom, but the layers of it are held together by intermolecular forces, making it able to slide |
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Properties of simple molecules |
• Low melting and boiling point (due to weak intermolecular forces, not covalent bonds) • Can't conduct electricity |
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Properties of graphene |
• High melting point due to strong covalent bonds • Very strong • Can conduct electricity |
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Properties of buckminsterfullerene |
• Slippery • Low melting point |
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What is a polymer |
• A large molecules made from small molecules |
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Properties of polymers |
• Higher melting point than small molecules |
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What is metallic bonding? |
When 2 metals share delocalised electrons |
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Properties of metals |
• Good conductor of heat and electricity • High melting point |
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Physical properties of metals |
• Can conduct electricity when solid and liquid • Shiny when freshly cut |
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What are transition metals |
The metals in-between group 2 and 3 |
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What do most transition metals have that other metals don't have |
• Higher melting points • Higher density • Greater hardness • Greater strength |
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Give an example of a transition metal that doesn't have the typical properties |
Mercury |
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What are some chemical properties of transition metals? |
• Reacts slowly with oxygen, or not at all • Reacts slowly with cold water, or not at all. Iron forms rust in warm water • Can form coloured compounds |
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What is group 0 |
Noble gases |
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What is the trend in boiling points of group 0 abd why |
• They all have low boiling points. As you go down the boiling point increases • This is because atoms as you go down the atoms fey bigger, making the intermolecular forces stronger, meaning more energy is needed to overcome them |
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What are the chemical properties of group 0 and why |
• Group 0 elements are inert because they have a full outershell. Atoms react by losing or gaining electrons to get outershells, but noble gases already have full putershells so they don't react |
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What is group 1 called |
The alkali metals |
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Physical properties of group 1 metals |
• Soft • Relatively low melting points • Low densities |
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What is the trend of melting points in group 1 and why |
Going down the melting point decreases |
