Table salt is made of ions, which are atoms or molecules that have a net electric charge due to the loss or gain of one or more electrons. Ions can be either positively charged, due to the loss of electrons, or negatively charged, due to the gain of electrons. Table salt is made up of two ions, sodium and chloride, which form an ionic bond when combined. Sodium has a positive charge, while chloride has a negative charge, and the two ions attract each other to form a stable compound.