* Metals are excellent conductors of electricity. This is due to their free-moving electrons.

* Nonmetals are generally poor conductors of electricity. They tend to hold their electrons tightly, making it difficult for electrons to flow freely.

When a metal reacts with a nonmetal, they form an ionic compound. Ionic compounds are formed by the transfer of electrons from the metal to the nonmetal.

* Ionic compounds, in their solid state, are typically poor conductors of electricity. The ions are held in a rigid lattice structure and don't have the freedom to move and carry an electrical current.

* However, ionic compounds dissolved in water (forming an electrolyte solution) become good conductors. The ions become free to move in the solution, allowing for the flow of electrical current.

In summary:

* The metal itself remains a good conductor.

* The nonmetal itself remains a poor conductor.

* The ionic compound formed is generally a poor conductor in its solid state, but can be a good conductor when dissolved in water.

Example:

* Sodium (metal) + Chlorine (nonmetal) -> Sodium Chloride (NaCl) (ionic compound)

* Solid NaCl is a poor conductor.

* NaCl dissolved in water is a good conductor.