KI is an ionic compound composed of potassium (K+) and iodide (I-) ions.
Here's why:
* Ionic Compounds: KI is an ionic compound because it's formed by the electrostatic attraction between a metal (potassium) and a non-metal (iodine).
* Cations and Anions: Potassium (K) loses one electron to become a positively charged ion (K+), while iodine (I) gains one electron to become a negatively charged ion (I-).
* Formula Unit: The formula KI represents one formula unit of the compound, indicating a 1:1 ratio of potassium ions to iodide ions.
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