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Answered

Why do some materials conduct electricity better than others? How can electrical conductivity be used to distinguish between metals and nonmetals?

Answer :

For the conduction of electricity, free electrons are required.

Those materials having free electrons conduct electricity.

Metals are usually good conductors of electricity while non-metals are poor conductors of electricity.

Thus, in this way electrical conductivity can be used to distinguish between metals and nonmetals.

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