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Chemistry

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Covalent bonding   show
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Covalent bonding is shown by   show
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Ionic bonding   show
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Metallic bonding   show
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show Good conductors due to sea of delocalised electrons Tough as lattice layers can easily slide over one another Malleable and ductile as lattice layers can move  
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show A giant covalent structure. 4 bonds to each carbon resulting in a high m.p and b.p Insoluble in water Not conductible as no free electrons Very strong as formed under lots of pressure and high temperatures  
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show 3 strong covalent bonds around each carbon so one delocalised electron. Hexagonal layers held together by delocalised electrons Weak inter-layer forces High m.p and b.p Layers can slide over each other so a lubricant Conducts due to electron  
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Silica   show
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Giant Ionic structures   show
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show Strong covalent bonds between atoms but weak intermolecular forces Often liquid and gases No free electrons so don't conduct Do not dissolve in water  
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Alloys   show
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show 1-100 nm small Antimicrobial- Nano silver so used for medical stuff Absorbs UV rays but stays transparent- Nano zinc oxide  
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Bucky balls   show
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Graphene   show
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Fullerene   show
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show -High conductivity-> micro electronics -Strength -> Building materials enhancing - High tensile strength-> Wires - Light-> Overhead cables, sports equipment  
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Pros and Cons of nanotechnology   show
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Shape memory polymers   show
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Shape memory alloys   show
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Thermochromic dyes   show
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show Changes colour with light Uses- T-shirts and glasses to sunglasses  
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show Low melting point to be easily moulded Uses- Gumshields  
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show Can shrink and swell by holding lots of water in it's polymer chains. Also responds to temperature and pH Uses- nappies, absorbing toxic spillages  
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show  
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