In the case of NaCl (sodium chloride), the *Lewis dot structure* shows the *transfer* of one valence electron from sodium (Na) to chlorine (Cl). This forms a *positive sodium ion (Na+) and a negative chloride ion (Cl-)*. The electrostatic attraction between these ions forms the *ionic bond* in NaCl.

Here is the Lewis dot structure for NaCl showing the ionic bond:

```

: :

Na + :Cl:

: . . .

```

In this structure, the electron from sodium is shown transferred completely to chlorine. This results in sodium (Na+) having a *positive charge* and chlorine (Cl-) having a *negative charge*. The opposite charges of these ions create the *electrostatic attraction* that forms the *ionic bond*.