We know that metal is a good conductor of heat so when we touch the metal chair our heat flows to chair and feel cold but wood is bad conductor of heat. Hence, we feel colder when we touch a metal chair.
In metals, the outer electrons in its atoms are more loosely bound than in wood. Metal atoms are packed more densely and can transmit heat vibrations more readily.But actually, they are the same temperature. Just that metal can draw the heat out of your body faster, so it feels colder to touch.In general, metals feel colder or hotter to the touch than other materials at the same temperature because they're good thermal conductors. This means they easily transfer heat to colder objects or absorb heat from warmer objects. ... Thermal insulators like plastic and wood don't transfer heat as easily.
If used in a certain way, metal can indeed act as a good heat shield. ... Thermal radiation carries energy and therefore transports heat. Since thermal radiation is a form of light, it shoots out in straight lines, travels easily through free space, and is easily blocked by materials.Any good conductor of heat will have more number of electrons. As metals have more number of electrons than wood they can conduct heat much more better than wood. ... As the number of electrons present is more in any metal as compared to wood metals will conduct electricity much more better than wood.
In the same situation, metal dissipates heat faster than plastic. In other words, metal cools faster. ... The material that cools (gets rid of its heat) fastest is the one that can conduct thermal energy to the surface and readily transfer the heat by conduction, convection, or radiation to the adjoining material.Steel has a thermal conductivity of 50.2 W/mK while that of wood is no more than 0.12 W/mK. This is why steel feels colder than wood at the same temperature.