Is potassium a cation or anion?

Potassium Chloride (KCl) is neither an anion or a cation, as these have negative and positive charges respectively. K+ is the cation of KCl, and Cl- the anion. An atom is the smallest unit of an element that gives the element its properties, so therefore, KCl is not an atom either (K and Cl are made up of atoms). Consequently, you could deduce that KCl is a molecule, however, you would be incorrect as the Word 'molecule' suggests that the K-Cl bond is a covalent bond, which it is not. The K-Cl bond is ionic, therefore making KCl a compound. Hope this helps! John S :-)