* Ionic Bonding: Sodium chloride is formed by the electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are arranged in a crystal lattice, with no distinct, individual molecules.
* No Discrete Units: Unlike molecules, which are held together by covalent bonds, ionic compounds lack discrete units. The ions are continuously repeating in a three-dimensional structure.
* Formula Unit: The formula NaCl represents the simplest ratio of ions in the crystal lattice, known as the formula unit.
In summary, while we use the term "sodium chloride" as if it were a molecule, it's more accurate to refer to it as an ionic compound with a formula unit of NaCl.
