Here's why:

* Chemical Formula: NaCl represents the chemical formula for sodium chloride.

* Subscripts: The subscripts in a chemical formula indicate the number of atoms of each element in a molecule. In NaCl, there are no subscripts, which means there is one atom of each element.

* Ionic Compound: Sodium chloride is an ionic compound, meaning it is formed by the electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). The formula NaCl represents the simplest ratio of these ions in the crystal lattice.

Let me know if you have any more questions!