Question

Using criss cross method find the chemical formula for Potassium Nitrate

Answer 1

As you know potassium has +1 valency and nitrate has - 1

So
K+ No3-
Formula for potassium nitrate will be KNo3

Answer 2

Helloo!!

Potassium symbol K has a Valency +1
means that it can give one electron to any other element to get stable or get near Nobel gas configuration!!

And Nitrate No3 has a valency -1 means that it requires 1 electron to get stable!!

Using Criss cross method potassium give its one electron to Nitrate to form potassium Nitrate!!

Chemical formula of Potassium Nitrate is KNO3

hope it helps