Is a pail of garbage a element ,compound or mixture?

A pail of garbage is a mixture. To figure out how and why it is, you need to understand what each of these things are. If it was an element, it would have a symbol and be on the periodic table of elements. If it was a compound, it would be a mix of two or more elements chemically combined. The reason it's a mixture is because there is no symbol for it, and you can PHYSICALLY separate it. Hope that makes sense! :)

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.

if it's not useful, feel free to report for mistake in answer.