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First of all, we must face up to and attach importance to chemistry. Don't think that if you are not good at math, or physics, or chemistry if you are not good at other subjects, this kind of thinking is wrong. In junior high school, I have to memorize a lot of chemistry and memorize a lot.
For example, the symbols and names of the first 20 elements in the periodic table. For example, valency. For example, some chemical formulas, chemical equations.
Girls, on the contrary, have an advantage in backs. So, don't think that just because you're a girl doesn't think chemistry is good. When I was in college, there were 64 people in my class, 32 men and 32 girls.
These female students are all top chemistry students, otherwise they would not have chosen to major in chemistry.
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You should be able to do the basic types of questions. Exams are not all difficult questions, basic questions: mid-range questions:
Problem = 6:3:1 According to this ratio, we can get points for basic questions by memorizing basic knowledge, that is, it is not a problem to pass the basic question type.
Intermediate questions require students to think appropriately, and if they are a little difficult, they must learn to classify the question type, what kind of questions to test what kind of knowledge points, and what angle such questions should be thought from, slowly summarize and accumulate slowly, and there is no problem in getting 80% of the scores. This is the key to solving mid-range problems. There are only a few difficult problems, which are usually more comprehensive and indeed difficult, but they can be solved as long as they master the methods and skills.
To sum up, it is relatively easy to score more than 80 points in chemistry.
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To be honest, junior high school chemistry is really not difficult, junior high school chemistry is mainly to learn inorganic chemistry, high school organic chemistry is called difficult, junior high school is mainly the stage of laying the foundation, usually involves more things to memorize, understand the content is relatively less, so junior high school chemistry is commonly known as the liberal arts in science, junior high school chemistry is mainly elements, substances and several important reactions to remember clearly, including: chemical reaction, displacement reaction, metathesis reaction, decomposition reaction, etc., there is an experimental phenomenon of material reactions, It's good to remember the properties, color, hardness, solubility, etc. of the substance. Chemistry in junior high school examination mainly examines the above four reactions, the most important is the metathesis reaction, because the metathesis reaction is mainly a reaction in acid-base salts, so it is a common test point, and again, we must remember that those substances are gases, those things precipitate, and the reaction is a full reaction and an insufficient reaction Sometimes the substances generated are different, which involves the problem of valency, junior high school chemistry, there are only a few substances whose valence is constantly changing, one is hydrogen, iron, carbon, sulfur, and the common test is iron, Because the color of ferric iron and ferric iron is different, it can be used as a basis for determining substances.
Therefore, as long as you memorize more in your studies, you will definitely get high marks in junior high school chemistry.
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First of all, let's look at the first 20 elements of the periodic table, plus the commonly used iron and copper, the characteristics of these elements, valence, and experimental phenomena, such as the color difference between ferric iron and ferric iron, and the fact that calcium will become turbid in the process of forming calcium carbonate. The main thing is to memorize the details of the book, understand the various elements, just like recognizing people, remember their electronic arrangement, chemical valence, characteristics, and the previous combinations of various elements, it is recommended that you write these elements on a piece of paper, and then you combine, and then write out the chemical equations that can get them, such as water electrolysis into hydrogen and oxygen, hydrogen and oxygen combustion to get water, you will get unexpected surprises when you do these things, but the premise is that the various characteristics of the elements should be remembered, or you can't write a few. Keep in mind the characteristics of the elements, abide by the conservation of elements and the conservation of mass, and some of the chemical reactions in the middle of the questions are very complicated, or even the conditions are not enough, and you don't know how to react at all, so you can find the key elements and solve the problems directly according to these two laws, and there will be no mistakes.
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Mainly memorize chemical equations. Understanding the core of chemical equations will also help you understand experiments. There is also the concept of each part must be clear and memorized.
Do more questions, and have the habit of collecting mistakes. When writing a wrong question book, pay attention to the reason for the mistake and the process of solving the problem. If possible, it is best to write one or two more examples of the same type.
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Pay attention to problem-solving methods and skills. There are not many types of difficult questions, master the basic question type and solution methods, and the other questions are "change the soup but not the medicine", the methods and skills are basically the same, and you only need to apply them. In addition, you should be careful in doing the questions, carefully review the questions, think carefully, and don't lose points because of the sloppy review questions, which would be a pity.
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Pay attention to the ability to summarize. If you want to get a high score, you must learn to self-summarize the ability, this time the question is wrong, the lack of knowledge, hurry up and read the book and read the notes, make up for the shortcomings, and don't make mistakes next time.
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Listen carefully to lectures, do exercises carefully, memorize equations, memorize experimental principles, experimental phenomena, and experimental procedures.
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First generate interest, such as experiments, phenomena, etc., and then do more questions, listen to lectures, memorize common equations, and laws, and special cases.
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Memorize formulas, do exercises, and listen to lectures.
I just graduated from high school, and the chemistry test is equations, many questions are based on equations, plus some chemical properties become a very good question, memorizing equations also helps to understand and memorize chemical properties, come on to remember formulas, I believe you will improve. Also, communicate with the teacher more and improve faster. >>>More
If high school students want to learn high school chemistry well, they should not only rely on careful listening in class to improve their chemistry scores, but also rely on timely consolidation after class to help them complete a deeper understanding of chemistry. In addition to the consolidation of knowledge points, high school students should also review and summarize their classroom listening status, high school students can summarize their classroom listening status from the record of their class notes, and then reflect on their own shortcomings in the lectures, and remind themselves to correct them in time, and look for something similar to Chengdu 211Educate such training schools, develop plans with the help of professionals, and learn high school chemistry with methods and skills.
Parents should praise and encourage their children more, and less blame and scold. Children have self-esteem, and they are proud when their achievements are recognized by everyone. Parents should not let go of every opportunity worthy of praise, when the child has achieved a little achievement, let him feel the joy of success, let him know how happy success is, so he will do the same next time. >>>More
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Junior high school? Hehe back is a must be memorized, like the periodic table, chemical equations are all to memorize, of course, the back alone can not be solved, the class to listen well, there is also a doorway. Chemistry is not difficult, don't study with a resistant heart, there are many benefits to learning chemistry, you can think, learn chemistry well, you can make explosives, you can blow up schools, right? >>>More