Question detail
Which of the following is a direct consequence of delocalised electrons in a metallic lattice?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Bonding
Question
- A. Electrical conductivity
- B. Formation of ionic lattices
- C. High melting points due to strong ionic bonds
- D. Strong covalent bonds between atoms
Answer
Electrical conductivity
Explanation
The correct option is Electrical conductivity. Electrical conductivity is the best answer because it directly supports the AQA A-Level Chemistry objective to explain electrical conductivity in metals. This reasoning is anchored to Metallic bonding in Bonding, and it separates conductivity from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.
Common mistake
Misunderstanding Conductivity
Students often confuse the role of delocalised electrons in metallic bonding, thinking that all electrons contribute to conductivity.
Remember that electrical conductivity in metals is due to the movement of delocalised electrons. The formula for conductivity can be understood as the ability of these electrons to move freely through the metallic lattice, allowing electric current to pass. Therefore, focus on how the structure of metals allows these electrons to move, leading to high conductivity.
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