Final answer:
The Lewis structure for hydrogen fluoride (HF) depicts zero double bonds, showing a single covalent bond between hydrogen and fluorine.
Step-by-step explanation:
The Lewis structure for hydrogen fluoride (HF) shows that there are no double bonds. Hydrogen (H) has one valence electron and fluorine (F) has seven valence electrons. In the formation of HF, one electron from hydrogen and one electron from fluorine are shared, forming a single covalent bond. Both atoms achieve stable electron configurations through this sharing: hydrogen completes its duet, and fluorine completes its octet. Hence, the Lewis structure of HF is represented as H-F, with a single line indicating a single bond between hydrogen and fluorine.