Before revision: The contribution of a metal's electrons to its heat capacity and thermal conductivity, and the electrical conductivity of the metal itself can be approximately calculated from the free electron model.
After revision: alt=Battery demonstration unit for conducting polymers built by nobel laureate Alan MacDiarmid|Battery demonstration unit for conducting polymers built by nobel laureate Alan MacDiarmidThe contribution of a metal's electrons to its heat capacity and thermal conductivity, and the electrical conductivity of the metal itself can be approximately calculated from the free electron model.