Vacuum
not gold
Glass
The poorest conductor of electricity is typically rubber or glass, as they have very high resistance. The best conductor of electricity is silver, followed by copper, due to their low resistance properties.
The poorest conductor of heat is typically materials with low thermal conductivity, such as wood, plastic, or glass. These materials do not conduct heat as efficiently as metals like copper or aluminum.
Metal
Metal
Most of the metals are good conductors of heat and electricity. Exception to this rule is silver and copper. Spoons made out of silver and copper pans used in cooking does not conduct heat easily.
Metal is a good heat conductor because its atoms are closely packed together, allowing the transfer of heat energy through the material. This is why metal objects, like pots and pans, heat up quickly when exposed to heat sources.
A conductor of heat if it is made of metal.
Wood is not a conductor of heat and so is plastic whereas metal is the perfect conductor for heat
Metal is a good conductor of heat, which means it can easily transfer heat from one part to another. Wood, on the other hand, is a poor conductor of heat, so it doesn't transfer heat as effectively. This is why metal objects get hot quickly when exposed to heat, while wood takes longer to heat up.
As a metal californium is a heat conductor but no data exist on the thermal conductivity.