When you are facing the third year of junior high school, do you suddenly feel that the review is very difficult, it is actually that you have not properly organized the knowledge, compared with the liberal arts, the chemical knowledge system is more large, and the knowledge is organized. The system is the first step in learning chemistry to improve performance.
Theorems, formulas, properties, terminology, units, etc., people are really easy to confuse, if students fall into a certain link, it is easy to cause knowledge loss, so in the middle school It is easy to lose points.
The following are the five charts that cover the entire junior high school chemistry. It’s easy to remember, you deserve it.