Why are metals good conductors of heat and electricity?

Almost all existing metallic elements are conductor of electricity, although the conductance varies according to the element. The chemical elements that are considered as very good conductors are as follows:

   Copper

   Silver

   Aluminum

   Gold

   Nickel

   Chromium

   Iron

   Magnesium

   Mercury

   Titanium

   Molybdenum

Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.

Explanation:

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