Question detail
What happens to the outer-shell electrons in metals?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical bonds, ionic, covalent and metallic
Question
- A. They are lost to form positive ions.
- B. They are shared between atoms.
- C. They are delocalised and can move freely.
- D. They remain fixed in place.
Answer
The correct option is They are delocalised and can move freely.. This answer is correct because it matches the approved learning objective to explain that outer-shell electrons in metals are delocalised in the subtopic Metallic bonding.
Explanation
The correct option is They are delocalised and can move freely.. They are delocalised and can move freely. is correct because it directly supports the approved learning objective to explain that outer-shell electrons in metals are delocalised. This belongs to the subtopic Metallic bonding within Chemical bonds, ionic, covalent and metallic, 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 Metallic bonding.
Common mistake
Misunderstanding Delocalised Electrons
Students often think that outer-shell electrons in metals are localized and not free to move.
Emphasize that outer-shell electrons in metals are delocalised, meaning they can move freely throughout the metallic structure, contributing to properties like conductivity.
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