Question detail
Why are metals typically good conductors of electricity?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
How bonding and structure are related to the properties of substances
Question
- A. They have a high density.
- B. They have delocalised electrons that can move.
- C. They have a regular arrangement of atoms.
- D. They are solid at room temperature.
Answer
The correct option is They have delocalised electrons that can move.. This answer is correct because it matches the approved learning objective to explain why metals conduct electricity using delocalised electrons as mobile charge carriers in the subtopic Metals as conductors.
Explanation
The correct option is They have delocalised electrons that can move.. They have delocalised electrons that can move. is correct because it directly supports the approved learning objective to explain why metals conduct electricity using delocalised electrons as mobile charge carriers. This belongs to the subtopic Metals as conductors within How bonding and structure are related to the properties of substances, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Metals as conductors.
Common mistake
Misunderstanding Charge Carriers
Students often confuse the mobile charge carriers in metals with those in ionic compounds, thinking both use ions to conduct electricity.
Clarify that in metals, delocalised electrons are the mobile charge carriers, while in ionic compounds, mobile ions conduct electricity.
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