Not that the solid does not conduct electricity, like the solid potassium chloride, but why the graphite rods, wires, these solids can conduct electricity
Since there is no moving charge in potassium chloride crystals, it naturally cannot conduct electricity. Potassium chloride in molten water and in molten state, because of the free movement of chloride and potassium ions, it can conduct electricity
Because the graphite conductive graphite to each carbon atom and other carbon atoms form 3 covalent bonds, each carbon atom retains 1 free electrons to transfer charge. A metal dielectric wire, a free electron metal dielectric micro, conductive!
This statement must be imprecise. The solid electrolyte does not move freely, so it cannot conduct electricity. There is a free charge in the metal conductor, so it can conduct electricity
