Apart from the facts that metals always loose electrons and are good electric conductors and that non-metals always gain electrons and are bad conductors, what is the difference between the two?
Metal is the same temperature as the rest of the room. It just feels cold because it conducts heat so well. When you touch something non-metallic, the surface instantly heats to the temperature of your finger and does not feel cold.
The atoms in metal form closely-knit structures, allowing metal to absorb more kinetic energy (heat) then most other materials.
Metals have a very low specific heat, which means that it takes very little heat to change their temperature. This means two things: Metals heat up quickly, and metals cool down quickly. When metal is in the direct sunlight for even a short period of time, it heats up fast. For example, the buckle on your seatbelt. However, metal is also quick to cool down. The air in your room probably is blowing across the metal and in this way the metal is constantly in contact with a colder mass, and heat can quickly move out of the metal.
