Respuesta :

K + I - > KI 
Potassium (needs to lose 1 electron) responds with Iodine (needs to pick up 1 electron) to fulfill both component's octet, shaping a salt, potassium iodide 
This is a similar case for NaCl, simply unique components. Trust this made a difference.

Explanation:

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When we unite potassium, which has a valence number of +1, that means that it has da electron, we unite it with iodine, which has a valence number of -1. That is, the iodine accepts an electron.

We form potassium iodide.

The formula is:

K + I ---> KI

It is a balanced equation since it uses one atom of each (iodine and potassium) for the formation of the product.