Question detail
Which statement best describes the role of delocalised electrons in metallic conductivity?
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. They form covalent bonds that allow electrons to hop between atoms.
- B. They are trapped in the metal lattice and do not contribute to conductivity.
- C. They are free to move throughout the metal, carrying charge.
- D. They create ionic bonds that facilitate electron flow.
Answer
They are free to move throughout the metal, carrying charge.
Explanation
Delocalised electrons are not bound to any single atom; they exist as a ‘sea’ of electrons that can drift under an applied electric field. This mobility is what allows metals to conduct electricity efficiently.
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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