Well it depends on the element.
The metals are all reasonable conductors. The covalent solid forms some elements of say Carbon as diamond, phosphurus, sulfur etc. are less so. The gaseous elements transfr heat by convection.
yes
semi conductor. a good semi conductor. It can also be n or p doped to increase it's conductivity
The radioactive element radium is a pretty good conductor of thermal and electrical energy. We see radium at the bottom of the Group 2 elements, the Alkaline Earth Metals. It can conduct heat and electricity well.
The thermal conductivity of hafnium is 23 W/m.K at room temperature.
Silver is most conducting element,but copper is better.
Silver is a good thermal conductor as it's a metallic element with many free electrons available for heat transfer.
a metal
Yes, that is what "good thermal conductor" means.
Yes, this is mostly true. It starts to become untrue near silicon.
Graphene is the best thermal conductor. Any metal or metallic objects such as a frying pan would be a good thermal conductor, including diamond.
steel
A material that is a good thermal conductor would hold in a lot of heat. These thermal conductors would also transfer heat easily.
It is a semi conductor
fabric
i forget
No.
Yes, being a metal, aluminum is a good thermal conductor.