Verified answer

Individually, you should know that K has 1 valence electron and F has 7. Therefore, you draw 1 dot around the K and 7 around the F. Putting them together creates that ionic bond you mentioned, yes. A bond is a sharing of electrons. This bond consists of two shared electrons, one from the potassium and 1 from the fluorine. Therefore, you draw K--F with 6 dots around both the K and the F.

Since the K lost its single valence electron, it now has a full valence shell, that is, an octet. Same with the fluorine, except it gained the electron that K had originally.