Question
Why are metals generally good conductors of electricity?
Answer Options
- A) They have few free electrons
- B) They have many free electrons
- C) They have many free protons
- D) They have few free protons
Correct Answer: B
Explanation
A good electrical conductor is a material that allows electric current (electron flow) to pass through it easily. Metals are excellent conductors because their atomic structure is characterized by an abundance of loosely bound valence electrons.
These many free electrons can easily move from atom to atom when a voltage is applied, allowing a large current to flow with very little resistance. Materials with few free electrons (like glass or plastic) are poor conductors and are called insulators (T5A08).
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