The chemical formula is the same - NaCl.
These are two phases (liquid and solid) of the same chemical compound, NaCl; molten salt is dissociated in ions.
The element copper can conduct electricity. These are two completely different chemical substances.
Sodium chloride is an inorganic salt with the chemical formula NaCl. Sodium chloride applications - spice for foods - preservative for foods - preparation of sodium, chlorine, sodium hydroxide - roads deicing - soaps fabrication etc.
Copper and molten sodium chloride are electrical conductors.
Molten sodium chloride consists of sodium ions and chloride ions and is therefore a conductor of electricity- and can be electrlysed.
You think probable to quartz; the chemical formula of silicon dioxide is SiO2.
In the molten state the ions of sodium chloride are free to move. Magnesium chloride would also conduct if it were molten. Since the ions of the magnesium chloride are bound together in the crystal lattice they cannot carry a current.
Sodium chloride is an electrolyte: - in water solution - as molten salt
By electrolysis of Molten Potassium chloride
Water solution of sodium chloride is an electrolyte; also molten sodium chloride.
In molten sodium chloride the free moving particles are Na+ and Cl- ions, during electrolysis sodium ion moves towards cathode and chloride ion towards anode.
Sodium chloride is an electrolyte: - in water solution - as molten salt