Xueba's Sea of ​​Stars

Chapter 36 Neutral Chemistry

Chemistry in high school is a very neutral subject, because among the three brothers in science and comprehensive science, physics is the most science subject, biology is the most liberal arts subject, and chemistry is caught in the middle, with half literature and half science.

To be more specific, in terms of the richness and fragmentation of knowledge content, chemistry is far less than biology, and in terms of calculation and analysis difficulty, chemistry is lower than physics.

It is the most balanced subject among the three brothers.

What balance means is that you can't have shortcomings, you can calculate and memorize, otherwise you won't be able to learn any of them.

In addition, the chemistry test paper is probably the most polarized that Wu Bin has ever seen. It is simple and can be done correctly without any brains. For example, the first question on a chemistry test paper he randomly picked up in the morning.

2012年2月29日，新发布的《环境空气质量标准》中增加了PM2.5检测指标。PM2.5 μm的颗粒物，其主要来源之一是化石燃料的燃烧，下列措施能减少PM2.5污染的事（)
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 instead of public transport.

Is it so simple that option B is shining there?
Because the other three seem to be wise answers, you can use common sense to know that they cannot be them. It can be said that if you choose this question wrong, then your teacher probably gave you a discount.

So this kind of question has 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 students that chemistry is actually closely related to your life. If you learn it well, you may be able to save nature.

However, when it comes to the big questions, the painting style of chemistry changes the most. For example, the last big question that Wu Bin saw in a middle school with a legendary level of difficulty in his hand is so difficult that when he reads the questions by himself, his whole painting style also changes 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), containing 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 electrons is _____.

(2) Whether the complexes formed by transition metal ions and water molecules are colored or not is related to the electronic arrangement of their d orbitals.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 “none” or “yes”) color.

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

(4) The flame reaction of K element is _____ color, and the microscopic reason for the flame reaction of many metal elements is _____.

(5) The simplified structural formula of the compound formed by Mg+ and phenylalaninate 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 modes of iron elemental cells are shown in the figure:
①The coordination numbers of Fe atoms in Figure 1 and Figure 2 are _____ and _____ respectively.

②If 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 dumbfounded after reading this question.

I thought he had already seen the chemistry of the second year of high school, and he would be able to fight even some big questions, but now, there is a fart!

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

Yu Xuguang almost dropped his glass when he saw Wu Bin's question, and looked at Wu Bin with a look of astonishment.

"You...you have already learned this level by yourself?"

"No, I just want to ask the teacher, what is it going to test me on this question?"

"I'm..."

In the end, Yu Xuguang swallowed back the two words that were insulting to the teacher's morality, then stood up and kicked Wu Bin several times in the direction where Wu Bin was kicked, with the posture that he wanted to kick Wu Bin out of the office.

And he kicked and shouted: "Is there anyone who studies like this!? The question asks you what to do if you don't know anything!"

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

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

Wu Bin had no choice but to hide while explaining: "No, teacher, I just wonder 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 sip of water and said, "This is a question about the structure and properties of matter."

"Oh..." Seeing that Yu Xuguang had no intention of continuing to kick, Wu Bin ran back and nodded again and again.

Then Yu Xuguang picked up the paper and continued: "This question also tests your calculations about crystals, the description and laws of electron motion outside the nucleus, as well as the configuration and hybridization orbitals of molecules. In short, it is very comprehensive. The last test Zhao Zhengfei made it all by himself in the class."

"Brilliant!"

Wu Bin didn't expect that there were such chemical experts 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 knows you."

"Could you not know! Your Teacher Cai just came here to brag to me... After talking about you." At this time, Lu Gang, who had been in the mode of watching a drama, interjected.

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

"En." Wu Bin nodded.

"Where did you learn on your own?"

"Just started looking at organic compounds."

"Oh? That progress is good, have you mastered the previous ones?"

"I can't say I have mastered it completely, but I understand the basics, the very basic ones."

With the lessons learned from Cai Guoping, Wu Bin's speech is absolutely watertight and extremely humble.

"Oh~ I understand basically everything, right..." Yu Xuguang nodded slowly while talking.

Seeing this reaction, Wu Bin panicked, he won't test me again...

Wu Bin doesn't have a +10 in chemistry. He is learning purely by relying on the lowest-level tutorials in the system. At most, he can improve his learning speed by relying on abstract thinking, but it is definitely not as super efficient as physics.

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

If Yu Xuguang were to draw questions to test him now, he really didn't have the confidence to deal with Cai Guoping at that time.

But fortunately, Yu Xuguang smiled and said after nodding his head: "Don't keep studying on your own, sometimes you can ask the teacher, it will save you a lot of detours."

Relieved, Wu Bin immediately nodded and replied, "Okay, teacher, I do plan to bother you when I start my lunch break tomorrow."

"Haha, okay, welcome." After Yu Xuguang finished speaking, he picked up a stack of papers on the table, "Let's go, let's go down together, try this set of papers in the next class, and see how much you can get."

"it is good."

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

Yu Xuguang walked up to the podium slowly, put the papers on the podium and said: "Today we will do a set of Haibei papers." After finishing speaking, he looked in Wu Bin's direction and said: "Wu Bin, if your test is better than the average of the class If the score is low, copy the chemical equations of several oxidation-reduction reactions, decomposition reactions, and replacement reactions that we have learned twenty times.”

"Huh!?" Wu Bin, who had just returned to his seat, looked confused.

'The co-authors are waiting for me here! '

PS: There will be another chapter later~ Please ask for a recommendation ticket.

(End of this chapter)