NaCl, or sodium chloride, is an ionic compound. This means it's formed by the electrostatic attraction between positively and negatively charged ions.

Here are the ions present in NaCl:

* Sodium ion (Na+): Sodium loses one electron to become positively charged.

* Chloride ion (Cl-): Chlorine gains one electron to become negatively charged.

Therefore, NaCl is composed of sodium ions (Na+) and chloride ions (Cl-).