"Most halogen oxides are unstable and will explode and decompose when impacted or even lighted."

"The important halogen oxides include clo2, i2o5, of2. From the molecular formula, it is easy to find that fluorine is a very special halogen. The oxidation state of fluorine in of2 is negative and is -1 valence. That is to say, the compounds of fluorine and oxygen are fluorides of oxygen, rather than fluorine oxides. In other words, fluorine has stronger oxidation properties than oxygen."

Liu Hualong’s lecture on halogen in this lesson is exactly what Lanjie means.

cl22naoh=naclonaclh2o

"Chlorine is dissolved in sodium hydroxide solution to produce sodium hypochlorite, sodium chloride and water. Do you know sodium hypochlorite? Have you used it? The main ingredient of 84 is sodium hypochlorite. In sodium hypochlorite, chlorine is 1 valent, and in sodium chloride, chlorine is -1 valent."

2f22naoh=2nafh2oof2

"Fluorine gas can also be dissolved in sodium hydroxide solution. Among the two fluorides on the right side of the equal sign, fluorine is -1 valence."

"Please remember that misfortunes never come in singular ways. Fluorine is unparalleled. Whenever fluoride is encountered outside fluoride gas, fluorine only has one compound value, -1 value. Based on this principle, students will match this formula."

()k2mnf6()sbf5→()ksbf6()mnf3()f2↑

The fluorine in fluorine gas is 0 valence, the fluorine in fluoride is -1 valence, and the potassium in the compound is 1 valence. These are all known conditions that he did not tell me, but I have a clear understanding of.

So in this chemical reaction, the compound valence of antimony has not changed, and it is 5% from left to right.

It changes to manganese, and manganese changes from 4 to 3.

Then there is a number game, write down the balance coefficients in the brackets and it's done.

This is a bonus question. Under the guidance of Teacher Liu, all the students got the scores on this question.

Liu Hualong nodded and said, "good, that's all about fluorine, let's talk about chlorine next."

"Is this gone?" Ranger was extremely disappointed.

Liu Hualong asked back: "Lanjie, are you not satisfied?"

"Teacher Liu, I'm very confused. Chlorine, bromine, and iodine have both positive and negative prices and 0 prices. Why is fluorine always the -1 and 0 prices? Everyone is eating it in the 7th row of the main family elements. Why can fluorine be used as a powerful fluorine?"

Ranger thought about this question for a whole day, but it was fruitless. Therefore, he asked Teacher Liu for advice and hoped that Teacher Liu would solve his doubts.

"good." Liu Hualong smiled mysteriously, and said: "This question is good, but I won't answer it in class. Langjie, if you are interested, you can find me after class. Let's continue to talk about chlorine. Chlorine dioxide is a common bleaching agent, disinfectant, a strong oxidant and chlorinating agent. The central chlorine atom is hybridized with sp2, and the molecular configuration is V-type. In chlorine dioxide molecules, the cl-o bond is 149pm. Please remember this number, it is a little longer than a double bond and a little shorter than a single bond..."

Note.

Remember again.

There are many knowledge points in the subject of chemistry that need to be memorized.

After the five major thinking values ​​were improved, Ranger's memory was also strengthened to a certain extent.

Remembering that the conclusion is not difficult for Ranjie, he wanted to figure out the essential reasons for the result of this conclusion, so as to learn from one example and understand all kinds of knowledge.

The bell rang and Lan Jie rushed to the podium. He kept Teacher Liu and asked Teacher Liu to answer his doubts.

Liu Hualong gave the answer incisively: "Fluorine has no D-orbit."

Buzz!

Ranger's brain exploded.

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

I'm stupid, I'm really stupid.

Fluorine has no D track, so why didn’t I, Ajie, expect such a simple logic?

Liu Hualong was very satisfied with Lanjie's infatuated expression. He wrote a detailed analysis process on the blackboard, and said while writing: "Other halogens can disassemble the electrons of the p-orbital in pairs, thus entering the d-orbital to form covalent compounds with a positive oxidation state, but fluorine cannot do it, so the compound valence of fluorine can only be 0 or -1."

Buzz!

Buzzing!

ha!

Hahaha!

Oli gives it to v!

Ranjie realized, Ranjie understood, Ranjie understood, Ranjie understood immediately!

Yesterday I took out the yarn and removed it! No matter how I disassembled the P orbital, it was futile, because this little bastard, Fluor, does not have a D orbital!

How about fluorine?

Flue life is the same as ever!

Ranjie went from stupid to stupid, from stupid to crazy, from crazy to happy, from joy to enlightenment, from...

"Langjie, I am relieved that you, a young man who is good at thinking, can think to this level. I am happy. I hope that more and more students like you will be better."

Liu Hualong was extremely satisfied with Ranger's colorful facial expression changes. He said: "There is another reason that fluorine has an electronegative degree of 3.98. It is too difficult to steal the electrons from it, so it is unlikely to make fluorine become a regular price under normal circumstances. Of course, technology is improving and chemistry is developing. Under certain extreme conditions, such as focusing a little with a high-power laser and obtaining a temperature range that is infinitely close to 0 Kelvin, you can force fluorine to get a regular price. This is an elevation question. We will not discuss it in depth. Ranger, you can study it yourself after you go to college."

Extreme conditions?

Determination zero?

Laser correction?

Force a good person to become a prostitute?

Oh no, is the fluorine the correct one?

This little widow is a bit coquettish!

Oh no, this gadget of chemistry has something to do.

"I understand, I understand, thank you Teacher Liu for your advice! One bow, two bows! Teacher Liu walks slowly!" Lanjie bowed twice, one bowed to respect Teacher Liu, and two bows to respect knowledge.

This student is diligent in studying and asking questions, has thoughtful etiquette and has a high understanding, and is actually a three-good student.

When Teacher Liu left, he had a peaceful smile on his face.

Yang Middle School has a strong style. When Teacher Liu explained that "Fluorine has no D track" to expand knowledge, Lan Jie was not the only one.

More than 20 students including Zhang Yutong, Li Zihan, Wu Zihan were all watching.

Some people have thoroughly understood, some have little understanding, and some have no understanding.

"Langjie, I'm so depressed."

During the lunch break, Zhang Yutong told Lanjie about her troubles and learned Lanjie's chemistry homework book.

"uh-huh?"

"I am increasingly unable to keep up with Teacher Liu's teaching rhythm. I am helpless and distressed, and I want to scold you for a while."

“Ha…yawn…”

"Lan... fell asleep?"

Zhang Yutong had never seen Lanjie take a nap. During her usual lunch break, Lanjie outputs stably. He would study the heavenly books she couldn't understand in the classroom.

At this time, Lanjie was lying on the desk and slept soundly. He muttered to himself in a vague way: "Little widow... kill you... I can't control it... I plan..."

"Water?"

Zhang Yutong was shocked. This guy, Lanjie, has been a bit abnormal in the past two days!

Isn’t it nice to have so many young single unmarried girls in the sheep?

Little widow?

Do it...do it?

"Brother, you must control yourself and never go on the path of crime."

Zhang Yutong whispered softly in Lanjie's ear with a lot of worries, then took a pencil and approved a sentence in Lanjie's chemistry homework book: there    is   no   such    as     a      great   talent   without    great   will     power.

Ranger seemed to encounter something strange in his dream and got into an inappropriate car.

Zhang Yutong finished learning Lanjie's chemistry homework book and left quietly.

Ranger has no habit of taking a nap.

He slept for two hours at noon today.

If Tang Xiaoyun hadn't woken up Lanjie with one punch, he might have slept until Chinese class.
Chapter completed!