Multiple choice general knowledge science & technology

Metals are good conductors of electricity because

  1. they contain free electrons

  2. the atoms are lightly packed

  3. they have high melting point

  4. All of the above
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A Correct answer
Explanation

Metals have delocalized free electrons that can move freely through the lattice structure. These mobile charge carriers are what allow electric current to flow easily. Atomic packing density and melting point are unrelated to electrical conductivity.

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