Scholar’s Starry Sea

Senior high school Chemistry is a very neutral subject, because in the third brother, Physics is the most science, biology is the most liberal arts, and Chemistry is in the middle, half-literate reason.

In more detail, it is about the richness and fragmentation of knowledge content. Chemistry is far smaller than biology. In terms of calculation and analysis difficulty, Chemistry is lower than Physics.

It is the most balanced subject among the three brothers.

What balance represents, that is, you can't have shortcomings, you have to be able to count and learn, otherwise you won't be able to learn wherever you are missing.

The other thing is that the Chemistry exam paper is probably the most polarized Wu Bin has ever seen. To put it simply, you can do it right without thinking about it, such as the first question on a Chemistry paper he picked up in the morning. .

On February 29, 2012, the newly released "Ambient Air Quality Standards" added PM2.5 detection indicators. One of the main sources of PM2.5μm 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 use less water to generate electricity

D. Encourage the use of private cars and less public transportation.

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

Because of the other three seemingly wise answers, you can use common sense to know that they are impossible. It can be said that if you choose the wrong question, then your teacher probably discounted your legs.

So 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 biggest significance of this kind of question is probably to tell you students, Chemistry is actually closely related to your life. After you learn it well, you might be able to save nature.

However, once the big topic is reached, Chemistry’s style of painting becomes the most intense. For example, Wu Bin is now holding the last big problem in a Legendary Grade difficulty middle school, which is so difficult for him to read it himself. The painting style of the whole person has also changed drastically (refer to "The Scream" by Edward Munch)

Mica flakes can be used as medicine. The main component of a certain mica schist is KMgFe₃Si₄O₁₂(OH)₃, containing a small amount of Cr and Mn impurities . Please answer the following questions:

(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 is colored is related to the electron arrangement of the d orbital. Generally, when it is dº or d¹º, there is no color, and when it is d¹~d⁹, there is a color. Then: _____[Mn(H₂O₆)]²+ (fill in "No" or "Yes") color.

(3) KMgFe₃Si₄O₁₂(OH)₃ can be expressed as _____ in the form of oxide.

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

(5) The short structure of the compound formed by Mg²+ and phenylalanine ion (molecular formula) is (molecular formula)

In this compound, the type of Chemistry bond is _____ (Fill in "metal bond", "σ bond", "π bond" or "coordination bond"), the hybrid orbital type of C atom is _____.

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

①The coordination numbers of Fe atoms in Figure 1 and Figure 2 are respectively _____with_____.

②If the crystal density of Figure 2 is pg·cm³ and the value of Avogadro's constant is NA, 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 Chemistry in the second year of high school, even if it was some big questions, he would have the power to fight, but now, there is a fart!

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

When Yu Xuguang saw that Wu Bin brought the title, he almost fell the cup, and looked at Wu Bin astonished.

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

"No, I just want to ask the teacher, what is it for me to test this question."

"I'm special..."

Finally, Yu Xuguang swallowed the two words that insulted the teacher's morals, and then stood up and moved towards Wu Bin, kicking in the direction of kicking After a few kicks, that posture is just like I can't wait to kick Wu Bin out of the office.

And yelled while kicking: "Is there you studying like this!? The question asks you don’t know what else you do!"

"Look down on Chemistry, right! "

"Look down on Chemistry, don't you!"

Wu Bin had to hide and explain: "No, teacher, I wonder how difficult Chemistry can be."

"I didn't look down on Chemistry."

"I didn't look down on it!"

In the end, Xuguang finally stopped when he was tired and walked back to the desk to drink. Two waterways: "This is a question about the structure and nature of matter."

"Oh oh..." Seeing that Yu Xuguang didn't mean to continue kicking, Wu Bin ran back again and again nodded.

Then Yu Xuguang picked up the paper and continued: "This question also examines your calculations about crystals, the description and laws of the state of movement of electrons outside the core, as well as the configuration and hybrid orbital of molecules. All in all, it’s very comprehensive. In the last exam, Zhao Zhengfei did it alone in the class."

"amazing!"

Wu Bin didn't expect there are even more in the class. This waits for Chemistry expert.

After saying that, Yu Xuguang rolled up the paper and knocked Wu Bin on the head: "Congratulations first, I heard that your Physics competition is good."

Wu Bin finished listening to the said. with a smile: "teacher even knows you."

"Can you not know! Your Teacher Cai just came to play with me... after talking about you." At this time, I was watching Lu Gang in the drama mode interjected.

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

"En." Wu Bin nodded.

"Where did you teach yourself?"

"Just started looking at organic compounds."

"Oh? That's a good progress. Did you master the previous ones? "

"I can’t say that I have mastered it completely, but I basically understand it, the very basic kind of basic."

With Cai Guoping’s lessons learned, Wu Bin’s words are definitely not one drop of water can leak out and extremely humble.

"Oh~you basically understand, right..." Yu Xuguang said slowly and nodded.

Wu Bin, who looked at this reaction, panicked and won’t want to test me again...

Wu Bin does not have +10 in the Chemistry section, it is purely based on the system. The lowest tutoring course is learning, at best, it relies on abstract thinking to increase the speed of learning, but it is definitely not as efficient as Physics.

What he has to do now is to understand the whole Chemistry, first take a score of about 7,80, and he can have an explanation from Bi Wanqing.

If Yu Xuguang wants to take a test for him now, he really hasn't dealt with the confidence of Cai Guoping at that time.

But fortunately, Yu Xuguang said with a smile after he nodded: "Don't keep studying by yourself. Sometimes you can ask the teacher to save you a lot of detours."

Relaxed Wu Bin also immediately nodded in response: "Okay, teacher, I do plan to disturb you as soon as I start my lunch break tomorrow."

"haha, good, welcome. Welcome. "After Yu Xuguang said, he picked up a stack of papers on the table, "Let’s go, let’s go down together, you can try to make this set of papers in the next class, and see if you can get a few points."

" Okay."

The teachers and students returned to the classroom together, and the class bell happened to ring.

Yu Xuguang slowly walked up to the stage, put the paper on the stage and said: "Today we will make a set of Haibei paper." After looking towards Wu Bin, he said: "Wu Bin, if Your test score this time is lower than the average score of the whole class. Just copy the Chemistry equations of several oxidation-reduction reactions, decomposition reactions, and substitution reactions that we have learned twenty times. "

"Ha! ?" Wu Bin, who had just returned to his seat, looked dumbfounded.

'Co-author is waiting for me here! '

PS: There will be another chapter in a while~ ask for a recommendation ticket.