An ionic bond, by definition, is a bond formed by a metal and a nonmetal.
Potassium is an alkali earth metal, and oxygen is a nonmetal.
Therefore, they form an ionic bond.
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Answer: ionic
Explanation: Ionic bond is formed by the complete transfer of electrons from a metal to a non metal.
In potassium hydroxide [tex](KOH)[/tex] there is complete transfer of electrons from potassium to hydroxide.
[tex]K^++OH^-\rightarrow KOH[/tex]
Covalent bond is formed by sharing of electrons. Metallic bond is formed in metals.
