Chapter 36 Neutral Chemistry

High school chemistry is a very neutral subject, because among the three science and comprehensive brothers, physics is the most scientific subject, biology is the most liberal arts subject, and chemistry is sandwiched in the middle, half-literary and half-science.

To put it more specifically, in terms of the richness and fragmentation of knowledge content, chemistry is much smaller than biology. In terms of calculation volume and analysis difficulty, chemistry is lower than physics.

It is the most balanced subject among the three brothers.

What balance represents is that you must not have any shortcomings, and you must be able to calculate and memorize, otherwise you will not be able to learn anything you are lacking.

In addition, the chemistry test paper was probably the most polarizing that Wu Bin had ever seen. It was easy to get it right without even using your brain, such as the first question on the chemistry paper he randomly picked out in the morning.

On February 29, 2012, PM2.5 detection indicators were added to the newly released "Ambient Air Quality Standards". One of the main sources of PM2.5 μm particulate matter is the burning of fossil fuels. The following measures can reduce PM2.5 pollution ()

A. Encourage the use of liquefied petroleum gas as fuel

B. Encourage the use of solar energy, wind energy and other energy sources

C. Encourage coal-fired power generation and reduce water conservancy power generation

D. Encourage the use of private cars and avoid taking buses for travel.

Is it so simple that option B is shining brightly over there?

Because you know with common sense that the other three seemingly wise answers cannot be them. It can be said that if you choose this question wrong, your teacher will probably break your legs.

Therefore, this kind of question has always been called the college entrance examination welfare question (Chemistry Limited Edition) by students.

In Wu Bin's view, the greatest significance of this type of questions is probably to tell you, students, that chemistry is actually closely related to your life. If you learn it well, you may be able to save nature.

However, once it comes to the big questions, the painting style of chemistry changes the most. For example, Wu Bin is holding the last big question that he saw in a middle school with a legendary level of difficulty. When he read the question by himself, his whole style also changed drastically. (Refer to Edvard Munch's "The Scream")

Mica flakes can be used as medicine. The main component of a certain mica schist is KMgFeSiO(OH) and contains a small amount of Cr and Mn impurities. please answer the following question:

(1) There are _____ unpaired electrons in the ground state Cr atom, and the electron cloud shape of the energy level occupied by the outermost electron is _____.

(2) Whether the complex formed by transition metal ions and water molecules has color is related to the electronic arrangement of its d orbital. Generally, when it is d or d, there is no color, and when it is d~d, there is color. Then: _____[Mn(HO)]+(fill in "without" or "with") color.

(3) KMgFeSiO(OH) can be expressed as _____ in the form of oxide.

(4) The flame reaction of K element is _____ color. The microscopic reason why many metal elements have flame reaction is _____.

(5) The simplified structural formula of the compound formed by Mg+ and phenylalanine ion (molecular formula) is (molecular formula)

In this compound, the types of chemical bonds are _____ (fill in "metal bond", "σ bond", "π bond" or "coordination bond"), and the hybrid orbital type of C atom is _____.

(6) At different temperatures, the two stacking methods of iron elemental unit cells are as shown in the figure:

①The coordination numbers of Fe atoms in Figures 1 and 2 are _____ and _____ respectively.

② If the crystal density in Figure 2 is pg·cm and the value of Avogadro’s constant is NA, then the distance between the two nearest Fe atoms in the unit cell is _____pm

Wu Bin was confused after reading this question.

I thought he had already seen the sophomore chemistry, and he would be able to fight even some big questions, but now, what the hell!

So Wu Bin immediately excitedly took the paper and went to the office to find Yu Xuguang.

Yu Xuguang almost dropped his cup when he saw the question Wu Bin brought. He looked at Wu Bin with a look of shock.

"You...have you taught yourself to this extent?"

"No, I just want to ask the teacher what question he is going to test me on."

"I am special..."

In the end, Yu Xuguang swallowed back the two words that insulted the teacher's ethics, stood up and kicked Wu Bin several times in the direction he was kicking, with a posture that made him want to kick Wu Bin out of the office.

And he was kicking and shouting: "How can you study like this!? The question asked you if you don't know anything, what else do you do!"

"You look down on chemistry, don't you!?"

"You look down on chemistry, don't you?"

Wu Bin had no choice but to hide and explain: "No, teacher, I'm just curious about how difficult chemistry can be."

"I don't look down on chemistry."

"I really don't look down on it!"

Finally, Yu Xuguang finally stopped when he was tired from kicking. He walked back to his desk and took a drink of water and said, "This is a question about the structure and properties of matter."

"Oh..." Seeing that Yu Xuguang had no intention to continue kicking, Wu Bin ran back and nodded repeatedly.

Then Yu Xuguang picked up the paper and continued: "This question also tests you on the calculation of crystals, the description and rules of the motion state of electrons outside the nucleus, as well as the configuration and hybrid orbit of molecules. In short, it is very comprehensive. The last test At that time, Zhao Zhengfei was the only one in the class who made it."

"Awesome!"

Wu Bin didn't expect that there would be such a chemistry master in the class.

After saying that, Yu Xuguang rolled up the paper and knocked Wu Bin on the head: "Congratulations first. I heard that you did well in the physics competition."

After hearing this, Wu Bin smiled and said, "Teacher, even you know about it."

"Don't you know? Your teacher Cai just came to tell me... After talking about you." At this time, Lu Gang, who had been watching a movie on the side, interrupted.

Yu Xuguang smiled and continued to say to Wu Bin: "Are you planning to replenish your chemistry now?"

"Yes." Wu Bin nodded.

"Where did you learn on your own?"

“Just started looking at organic compounds.”

"Oh? That's good progress. Have you mastered the previous ones?"

"I can't say that I have completely mastered it, but I basically understand it. It's very basic."

With Cai Guoping's experience, Wu Bin's speech was absolutely impeccable and humble.

"Oh~ you basically understand it, right..." Yu Xuguang nodded slowly as he spoke.

Seeing this reaction, Wu Bin panicked. He was not going to test me again...

Wu Bin didn't have a +10 in chemistry. He was purely relying on the system's lowest-level tutorials to learn. At most, he relied on abstract thinking to improve his learning speed, but it was definitely not as efficient as physics.

What he has to do now is to understand the whole chemistry and get a score of 7 or 80 first, which can be considered as an explanation to Bi Wanqing.

If Yu Xuguang wanted to test him now, he really wouldn't be able to cope with Cai Guoping's confidence at that time.

But fortunately, Yu Xuguang nodded and said with a smile: "Don't study on your own. Sometimes asking the teacher will save you a lot of detours."

Wu Bin, who breathed a sigh of relief, immediately nodded and responded: "Okay, teacher, I do plan to disturb you as soon as my lunch break starts tomorrow."

"Haha, okay, welcome." Yu Xuguang said and picked up a stack of papers on the table, "Let's go down together. You can try this set of papers in the next class and see how many points you can get."

"good."

The teacher and the student returned to the classroom together, and the bell just rang.

Yu Xuguang slowly walked up to the podium, put the paper on the podium and said: "Today we will do a set of Haibei papers." After saying that, he looked in the direction of Wu Bin and said: "Wu Bin, if you do better than the average of the class this time, If the score is low, I will copy all the chemical equations of several redox reactions, decomposition reactions, and substitution reactions that we have learned twenty times."

"Ha!?" Wu Bin, who had just sat back down, looked confused.

‘Co-author is waiting for me here! ’

PS: There will be another chapter later~ Please vote for recommendation.