The correct name for the compound KIO4 is potassium periodate.
Explanation: In this compound, potassium (K) is the cation, and periodate (IO4–) is the anion. Periodate refers to the polyatomic ion that contains iodine in its highest oxidation state (which is +7 in this case) bonded to four oxygen atoms. It is important to recognize the naming conventions for ionic compounds; the cation is named first, followed by the anion. Therefore, combining potassium and periodate gives us potassium periodate, which is commonly used in various chemical applications.