Why Do Metals Get Hot?

When someone put aluminum pan in oven, It does get hot, but since it is so thin, and an excellent thermal conductor (being metal), it radiates/conducts away all of its heat so rapidly that it cools off much faster than anything else, this phenomenon makes a person to touch it with bare hands.
On the other hand if some individual touches the metal pan, in case it is sufficient thick than one can burn his hand without hot pads, it’s related with masses of body and heat conduction.
When someone touches one of the hot aluminum racks it no longer has to radiate to reach. He is in direct contact. Heat transfers better through a heat conductive medium. Most Metals transfer heat quickly. Since the human body consists mostly of water one can safely state that by touching a metal rack it is equivalent to boiling the water in the body.
In general, the ability of a substance to conduct energy, in this case heat, is directly related to its density. Air, being much less dense than the metallic substance, conducts energy to a lesser degree. It is also one of the fundamental properties of metallic substances to conduct energy which is related to its atomic structure. Also, air can get really hot, but it just can't transfer that energy to someone hand as well as metal. Actually, aluminum pan or foil does get hot. In fact, if one wrap a potato in aluminum foil and put it in a hot oven, the foil will get hot first. This is because metals like aluminum are very good conductors of heat, so they absorb heat very quickly. When one pull out the potato, the same property of being a good heat conductor makes sure that the foil cools down very