Ecco perché:
* Legami ionici are formed by the electrostatic attraction between oppositely charged ions.
* Ioni are atoms that have gained or lost electrons, resulting in a net positive or negative charge.
* Unità formula represent the simplest ratio of ions in an ionic compound. They are not molecules because they do not involve sharing of electrons.
For example, in sodium chloride (NaCl), the formula unit represents one sodium ion (Na+) and one chloride ion (Cl-). This ratio is the simplest way to express the ionic compound, and it represents the repeating unit in the crystal lattice structure.
