Chemistry is involved in all the different areas of life and all the parts that are involved in our day and in our lives, and the reason why chemistry touches and is involved in everything that we do is that everything in our lives and in our day from all the activities that you do, in which we participate, can be divided almost into units. A small chemical structure that all works together to complement each other. Many people think that chemistry is a very complicated thing, but the truth is that all it requires is for the student to understand it, not memorization, as it is one of the most important practical sciences. In this course, we will help you if you are an Egyptian or Saudi student in the middle school (preparatory) or high school (advanced) stage.