Potassium fluoride, abbreviated as KF, possesses an ionic bond and is therefore an ionic compound. Potassium fluoride is an example of an alkali halide, because it consists of an alkali metal (potassium) and a halide (fluorine).
Alkali metals are found in the first group on the periodic table and include hydrogen, sodium and potassium. Halogens are found in the seventh group of the periodic table and include fluorine, chlorine and bromine. When an alkali metal and a halogen react, the alkali metal loses its one valence electron to the halogen and forms an ionic bond. Alkali halides are commonly known as salts and are always ionic compounds.