Question

what is the smallest unit of an ionic bond? an atom a molecule a formula unit

Explanation:

• An atom is the basic unit of matter, but in ionic bonding, atoms lose or gain electrons to form ions.
• A molecule is formed by covalent bonding (sharing of electrons), not ionic bonding (transfer of electrons).
• A formula unit represents the simplest ratio of ions in an ionic compound and is the smallest unit of an ionic bond.

Answer:

a formula unit