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Metals are good conductors of electricity because:

  • A.They contain free electrons.
  • B.The atoms are lightly packed.
  • C.They have high melting point.
  • D.All of the above.

Answer: A

Because metals contain free electrons.

In the metallic bond, the valence electrons are delocalised over the whole lattice rather than bound to individual atoms. An applied field sets this electron sea drifting, which is the current. The same electrons also carry heat, which is why good electrical conductors are good thermal ones.

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