They are good electrical conductors.
Beryllium and Molybdenum
These are good conductors-most metals are good conductors.
Semiconductor
Insulator is a material that resists the flow of electric current. materials such as glass, paper or Teflon are very good electrical insulators. These materials are used to support or separate electrical conductors without passing current through themselves.
Electrical insulators. Materials such as rubber, plastic, wood, air and some ceramics are all poor conductors of electricity, or good insulators.
Beryllium and Molybdenum
no
metals
Normally, materials which are good conductors of electricity are also good conductors of heat. This is because both electrical conductivity and heat conductivity is enhanced by mobile electrons, thus making metals both good electrical conductors and good heat conductors. However, I do not know if there might be an exception...
Metals are good electric conductors.
What materials make good conductors
These are good conductors-most metals are good conductors.
Metals
rubber
all metals are good conductors of heat and electric currents
Conductive materials: they are good conductors of heat or electricity. Nonconductive materials: they are not good conductors of heat or electricity.
Semiconductor