Why are metals good conductors of electricity?

In metals, electrons are freely held because they form metallic bonds with each other. In a metallic bond, instead of a bond created by sharing electrons  just between two atoms, electrons are shared between many atoms of the element of a metal. This creates a sea of electrons that makes it very easy for energy in the form electricity to move through the metal.

In most elements, atoms hold tightly to their atoms but in most metals, atoms hold their electrons rather loosely. 

Metals are good conductors because the molecules that are inside the metal are tightly packed together. This is why the heat moves through the metal quickly.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl