Is metal an conductor or insulator?

Answer 1

Metals are mainly known as very good conductors and very bad insulators of heat and electricity. Other solids, non-metals, are very poor conductors. They eventually conduct heat but very slowly. The best metal conductor is copper, even though it is at the bottom of the reactivity series.

But as to come to a conclusion, yes, most metals are conductors, some are just better than others.

Answer 2

First I think we need to decide if we are talking about heat or electricity. Below I have addressed the matter of electrical conductivity.

Metal consists of bonds that are different from that of organic materials such as plastics. The bonds in metals are appropriately named metallic bonds. These bonds can be thought of as a number of positive nuclei floating in a Sea of electrons. The fact that the electrons are not bound to any one nuclei gives them a great deal of mobility. It is this charge mobility that determines if something is a conductor or insulator. The more charge mobility the better the conductor. So metals are good conductors of electricity