Which of the following describes the formation of an ionic bond?

Potassium (K) loses an electron and becomes positively charged. Chlorine gains an electron and becomes negatively charged. The two atoms become attracted to one another.
Potassium (K) gains an electron and becomes positively charged. Chlorine loses an electron and becomes negatively charged. The two atoms become attracted to one another.
Potassium (K) and chlorine share an electron.