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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. These electrons are not bound to any specific atom and are free to move throughout the metallic structure. This movement allows them to carry an electric charge when a potential difference is applied, hence enabling electrical conduction.
Step 2
Explain why diamond is hard.
Answer
Diamond is hard because it has a giant covalent structure. In this structure, each carbon atom forms strong covalent bonds with four other carbon atoms, creating an extensive network. This arrangement results in a very strong material that requires substantial energy to break the bonds, contributing to diamond's hardness.
Step 3
Explain why thermosetting polymers are better than thermosoftening polymers for saucepan handles.
Answer
Thermosetting polymers are preferred for saucepan handles because they do not melt when heated; instead, they maintain their shape and structural integrity. This is due to the cross-links formed between the polymer chains which create a rigid network, making them suitable for high-temperature applications.