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What is the correct formula unit for the ionic compound, potassium iodide?

? PI2
? KI2
? K2I
? KI
? PI

1 answer

The correct formula unit for the ionic compound potassium iodide is KI.

Potassium (K) has a charge of +1 and iodide (I) has a charge of -1, so one potassium ion pairs with one iodide ion to form the neutral compound potassium iodide.