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This question is about the properties and uses of materials - AQA - GCSE Chemistry - Question 6 - 2016 - Paper 2
Question 6
This question is about the properties and uses of materials. Use your knowledge of structure and bonding to answer the questions. 6 (a) Explain how copper conducts... show full transcript
Worked Solution & Example Answer:This question is about the properties and uses of materials - AQA - GCSE Chemistry - Question 6 - 2016 - Paper 2
Step 1
Explain how copper conducts electricity.
Answer
Copper conducts electricity due to the presence of delocalised electrons in its structure. These electrons are free to move throughout the metallic lattice, allowing electric current to flow. When a potential difference is applied across the copper, these delocalised (or free) electrons can move toward the positive terminal, which facilitates the conduction of electrical charge.
Step 2
Explain why diamond is hard.
Answer
Diamond is hard because it has a giant covalent structure where each carbon atom forms four strong covalent bonds with other carbon atoms. This extensive network of bonds creates a rigid and stable structure, making diamond one of the hardest known materials.
Step 3
Explain why thermosetting polymers are better than thermosoftening polymers for saucepan handles.
Answer
Thermosetting polymers are better than thermosoftening polymers for saucepan handles because they do not melt when heated and maintain their shape, even at high temperatures. This is due to the cross-linking of polymer chains, which provides structural integrity and prevents deformation, unlike thermosoftening polymers that can soften and lose shape when exposed to heat.