Here's why:

* Ionic Compounds: Sodium chloride (NaCl), common table salt, is an ionic compound. This means it's formed by the electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-).

* Dissolving in Water: When NaCl dissolves in water, the water molecules surround the ions, breaking the ionic bonds. The positive end of the water molecule (hydrogen) is attracted to the negative chloride ion, and the negative end of the water molecule (oxygen) is attracted to the positive sodium ion. This process is called hydration.

* Free Ions: Once dissolved, the sodium and chloride ions become surrounded by water molecules and move independently throughout the solution. They are no longer bound together as they were in the solid crystal.

In short: The ions are free to move independently in a solution, not bound as pairs.