Which of the following diagrams best represents the Lewis dot structure of solid KF?

• A. A lattice of K^+ ions (no dots) and F^- ions surrounded by eight dots (representing a full octet)
• B. A lattice of K^+ ions with one dot and F^- ions with seven dots
• C. A lattice of neutral K atoms each with one dot and F atoms each with seven dots
• D. A lattice of K^+ ions with eight dots and F^- ions with no dots

Answer: (A)

Verified step by step guidance

1. Recall that KF (potassium fluoride) is an ionic compound formed by the transfer of one electron from potassium (K) to fluorine (F).
2. Potassium (K) loses one electron to become K^+, which means it has no valence electrons (no dots) in the Lewis structure.
3. Fluorine (F) gains one electron to become F^-, completing its octet with eight valence electrons (represented by eight dots around F^-).
4. In the solid state, KF forms a lattice of ions: K^+ ions without dots and F^- ions surrounded by eight dots to show the full octet.
5. Therefore, the correct Lewis dot structure representation is a lattice of K^+ ions (no dots) and F^- ions each surrounded by eight dots.