Is grilling a ham and cheese sandwich and chemical or physical change?

Physical

Explanation:

I say physical because if you just think about the cheese it wasnt melted before u put that heat on it .

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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