Chemical study of law four of junior high school experience.doc

Chemical study of law four of junior high school experience Paper to write net: how to learn the discipline junior high school chemistry, is the majority of students and teachers issues of common concern. Here some personal recommendations for reference. 1 study of chemical knowledge to do the ‘three arrested,’ that is the basis of grasping, grasping ideas, grasping the law Should pay attention to the basics of learning, such as the element symbols, chemical formulas, chemical equations and the basic concepts and elements, compounds, the nature of doing the exercises should be good to summarize a summary of all kinds of questions and problem-solving ideas. Chemistry inherent between law, master of the law will be able to manage knowledge, memory knowledge, such as the valence of the general laws, the metal element is usually obvious-price, non-metallic elements are usually significantly negative price, single-mass element valence of zero, many elements of a change in price, conditions are different price different state, another example, the laboratory system of oxygen required for the test-tube gas generating device, the law as long as it is by heating a solid or both solid pharmaceutical drugs used for extracting the gas to be used in devices like the system of oxygen, If the law can be used to seize the information given in question told the Laboratory Preparation of methane gas with sodium acetate and soda lime mixture heated two solid, although we did not learn this part of knowledge, but based on solid-gas heating system to take the law shows that the device Preparation of oxygen with the same device. (2) the basic chemical concepts and principles of learning Junior high school chemistry is one of the significant features of the concept of more, the accuracy of these concepts to understand, whether to learn to master the skilled junior high school chemistry course of the relationship is very important is the formation of the correct exper