Question detail
What is the reason for the electrical conductivity of metals?
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. Metals have fixed ions that do not move.
- B. Metals contain delocalised electrons that can move freely.
- C. Metals have high melting points which enhance conductivity.
- D. Metals are good insulators due to their structure.
Answer
Metals contain delocalised electrons that can move freely.
Explanation
The electrical conductivity in metals is explained by the presence of delocalised electrons. These electrons are not bound to any specific atom and can move freely throughout the metallic structure, allowing them to carry an electric current. This is a direct consequence of metallic bonding, where positive metal ions are surrounded by a 'sea' of delocalised electrons.
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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