How is a physical change different from a chemical change?

A.)In a physical change, bonds break and new bonds form, forming new substances.

B.)In a physical change, the properties of the substances change entirely.

C.)A chemical change cannot be reversed, but a physical change can.

D.)A chemical change creates new kinds of atoms and molecules than were present before the change.

d

Explanation:

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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