What is the ionic formula for potassium iodide?

KI

Potassium Iodide is an binary ionic compound formed from a metal and a non-metal

Potassium is an Alkali Metal in the first column of . This means that potassium has 1 valence electron it readily gives away in order to seek the stability of the octet. This makes potassium a ##K^(+1)## cation.

Iodine is a Halogen in the 17th column or ##p^5## group. Iodine has 7 . It needs one electron to make it stable at 8 electrons in its valence shells. This makes chlorine a Il^(−1 ) anion.

Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that one ##I^(−1)## anions will balance with one ##K^+1## cation.

This makes the formula for Potassium Iodie, ##KI##.