"Just when the gathering was at the last moment, and you decided to forget, I also wanted to find an excuse to change the ending, but in the end I let go.

You said that after the breakup, don't make yourself uncomfortable, if you really need any reason, 10,000 is not enough.

I knew that you took this relationship too seriously, and said that you wouldn't let you go, if I really needed any excuse.

10,000 is not enough, I knew that I was inseparable from this feeling, and I didn't let myself go of what I said at the beginning.

If you really need any reason, ten thousand is not enough.

I knew that you took this relationship too seriously, and I didn't let you go at the beginning.

I really need any excuse, 10,000 is not enough, I knew that I was inseparable from this feeling.

Whatever you said at the beginning, you didn't let yourself go.

"10,000 Reasons" repeatedly looks for a reason to stay, perhaps knowing that it is irreparable, but still praying foolishly.

Li Dabao's voice is a little hoarse and a little sad, so there is also a feeling of affection and sadness in the song.

sang the pain and sorrow after the breakup in a hoarse voice, and became a love song for healing.

also successfully answered the reason why Lao Song's first girlfriend, Lao Song, the neighbor next door, wanted.

If you really need any reason why 10,000 is not enough?

If I really need any reason why 10,000 is enough?

"Bao Ye's talent is incomparable to that of us ordinary people, and he has written so many beautiful songs in such a short period of time. ”

The number of online users exceeded 12 million, which is already the highest record in the live broadcast industry.

Li Dabao has left an unsurpassed record for his peers in the live broadcast industry.

"Where is this song? I want to download this song as soon as possible, and I want to use this song as a ringtone on my phone. ”

"Upstairs, what is it used as a ringtone? It's better to download it as a ringtone, the ringtone is for others to hear, and the ringtone is for yourself." ”

"From the perspective of the two people's means, I think that the person who sets the bell is a selfish person, and the person who sets the ringtone is a person who is willing to give. ”

Lao Song, the neighbor of Lao Wang next door, was particularly moved: "I, as an ordinary fan, actually got the help of Bao Ye, I am so moved."

Regardless of whether she gives me an answer or not, I am especially grateful to Bao Ye.

I didn't expect that there was a song written by someone else to help me. I was really impressed. ”

Zhang Shuangjiang and Zhang Yishui sat in the teahouse and drank tea.

"I knew he was messing around, but I didn't expect him to be so nonsense, he actually sang three classic songs in the live broadcast, isn't this stupid?" Zhang Yishui said angrily.

Zhang Shuangjiang: "It's dying fast, I hope I can see the day when he is exhausted." I don't know how many people will be happy until that day. ”

"By the way, haven't you heard that recently, there is a person who wants to challenge Li Dabao?" Zhang Yishui said happily, as long as someone is against Li Dabao.

His heart was inexplicably happy.

Zhang Shuangjiang also became interested: "Who is going to challenge Li Dabao?"

I heard that he is Wenshan, a good friend of the Chinese mathematician Cauchy, but he will not compare with Li Dabao in the field of mathematics that Li Dabao is familiar with.

Wen Shan is a chemist, and he wants to compete with Li Dabao in the field of chemistry. I heard that it is more than the production of husband and wife. Zhang Yishui said with a smile.

As soon as Zhang Shuangjiang heard that it was in the field of chemistry, his interest decreased greatly, if he wanted to compete in the field of mathematics or in the entertainment industry that Li Dabao was good at, he would be happy to watch the excitement, and for the time being, he was in the field of chemistry, which Li Dabao was not good at.

Even if you win, you won't be able to win.

This is what people hate the most with what they are best at, and what they are not good at, if you win, there is nothing to say, but if you lose the game, it will be a big problem.

Just when Li Dabao was about to get off the live broadcast.

Wenshan, a Chinese chemist, openly challenged Li Dabao on Weibo.

"I am a big country in China, and there are talents everywhere, especially Li Dabao, whether it is in the field of mathematics, music, or movies, his performance is quite good.

Today I would like to compete with Li Dabao in the field of chemistry.

The test project is also quite simple, the production of fluorine element, I believe that this is a fairly long time competition, and the results will definitely not be produced in a short time.

Li Dabao, do you dare to compare with me?

Didn't you say you could do anything? If you do, compare chemistry with me. ”

Li Dabao's fans discovered Wenshan's Weibo for the first time.

"This Wenshan is really shameless, originally I thought that people engaged in research were rigorous and modest, but I didn't expect that there would be such people.

If you compete with Bao Ye in the field of mathematics, I believe that no one really says anything about you, but you compete with Bao Ye in the field of chemistry that Bao Ye does not understand?

I really want to say why don't you compete with Bao Ye in the field of music that Bao Ye is good at, or compete with Bao Ye in live broadcasts?"

"If you compare with Bao Ye to make a movie, I will definitely support you, although Bao Ye's arrogant personality, I don't like it, but it's your fault to bully people like this. ”

Li Dabao remembered that in his previous life, when he was in college, he had studied the production of this thing.

In this life, he did not know that fluorine elemental matter had not yet been made.

The research process is quite difficult, but once you know the results, it is quite easy to make them.

Fluorine is an element of the halogen group and is the most reactive non-metallic element.

Normally, fluorine is a light yellowish-green gas, very corrosive, toxic, one of the strongest known oxidizing agents, and can even react with some noble gases.

In the history of the discovery of chemical elements, the research project with the longest duration, the largest number of participants, the greatest danger and the most difficult work is the preparation of elemental fluorine.

From the official identification of the fluorine-containing compound hydrofluoric acid to the preparation of elemental fluorine, a total of 118 years have passed.

Due to the extremely reactive chemical nature of elemental fluorine, the instruments used for its preparation and collection are particularly corrosion-resistant.

Moreover, the compound of fluorine has strong stability, and it is difficult to obtain the elemental substance of fluorine by ordinary methods.

In particular, fluorine gas and many fluorides are very toxic, and many chemists are poisoned to produce elemental fluorine, and some chemists even sacrifice their precious lives because of this.

It can be said that the preparation of elemental fluorine is the most tragic history in the history of chemistry.

Difficult explorerGerman mineralogist Agricola, known as the father of geology and mineralogy, published his famous posthumous work "Metallurgy" in 1956, in which he introduced the mineral fluorite (CaF2): fluorite is a low melting point mineral, adding a certain amount of fluorite in the steel smelting process can not only increase the furnace temperature, remove sulfur, phosphorus and other impurities, but also form eutectic with slag, enhance activity, fluidity, and easier separation of slag and metallic iron.

Swarnhard, a German, was a worker in glass processing. In 1670, he inadvertently mixed fluorite with sulfuric acid, which resulted in a pungent smell of smoke (i.e., hydrogen fluoride).

He discovered that the product could corrode glass, and developed a way to etch patterns on glass without diamonds or other abrasives.

Using this method, Swanhard made many glass works of art and became a well-known glass sculptor.

But he knew nothing about the principles of hydrogen fluoride and corroded glass, and was not interested, probably this is typical pragmatism.

In 1768, the German chemist Margrave confirmed that fluorite does not contain sulfur.

When he treated fluorite with acid, he discovered that a gas was produced and that it was capable of corroding glass.

Later, the Swedish chemist Scheler specialized in this gas and confirmed that it was an acid.

In November 1810, the Royal Society formally agreed with Davy's view that neither hydrochloric acid gas (HCl) nor fluoric acid gas (HF) contains oxygen, but it contains unknown new elements.

The new element in hydrochloric acid gas was named "chlorine", and three years later, the new element in fluoric acid gas was named Fluorine (F, fluorine), the root of which is taken from "flowstone".

Chlorine had been produced by Scheller as early as 1774, and elemental fluorine had not yet been produced at that time, so the difficult process of fluorine production began.

In the tragic process of fluorine production, the British chemist David and the French chemist Guy Lussac were the first to try to produce fluorine by electrolytic hydrogen fluoride, but both failed.

David himself was severely poisoned by inhaling hydrogen fluoride and recuperated for a long time.

In the thirties of the nineteenth century, the Knox brothers, Irish chemists, used a container made of fluorite to react chlorine with mercury fluoride in order to make fluorine, but they failed again.

Then the Belgian chemist Lloyette continued his experiments with Knox, and the result was even worse, he died of hydrogen fluoride poisoning.

Later, Lloyette's assistant, the French chemist Frémi, switched to electrolysis to produce fluorine.

In 1850, when he electrolyzed molten calcium fluoride, he saw a gas emitted from the anode, but he was unable to collect it. Twenty years later (1869), the British chemist Al Gower again used the electrolysis of hydrogen fluoride to produce fluorine, and as a result, not only was the electrode quickly corroded, but the resulting fluorine immediately reacted with the hydrogen produced and exploded. After learning from the failures, he concluded that lowering the temperature of the electrolyzer might be able to inhibit the activity of fluorine and succeed.

In the eighties of the nineteenth century, Mouissan, a student of the French chemist Frémi, took over the "baton" of fluorine production.

He summed up the lessons of the failures of his predecessors and decided to continue to use electrolysis to produce fluorine.

In 1884, he made a sophisticated design to dissolve potassium hydrogen fluoride in anhydrous hydrogen fluoride (used as an electrolyte) and electrolyze it at a low temperature of minus 50 degrees Celsius.

As a result, gas is released from the cathode as soon as the power is applied, while the anode does not move. After inspection, it was found that the insulating plug made of fluorite had been corroded. Two years later, Muisan used a U-shaped tube made of platinum with an insulating plug made of fluorite and immersed the entire unit in methyl chloride for re-electrolysis, which was successful.

June 26, 1886 was a memorable day when Muwassan finally collected the light yellow-green fluorine gas on his electrolysis unit.

The chemical reaction formula is as follows: 2KHF2=2KF+H2↑ (negative electrode) + F2↑ (positive electrode)

In 1899, Muwasan switched to copper equipment for electrolysis of fluorine, which was also successful.

Because although fluorine has a strong corrosive effect on copper, once a thin layer of copper fluoride is formed on the surface of copper, it has a protective effect.

In 1906, Muwasan was awarded the Nobel Prize in Chemistry for his success in fluorine production.

Fluorine is the first halogen, and it is the most reactive non-metallic element.

In order to produce fluorine element, chemists have worked one after another, and some of them have been poisoned and even sacrificed their own lives, which has become a tragic chapter in the history of chemistry.

Since 1886, when Muwassan applied electrolysis to produce fluorine, electrolytic oxidation has been the preferred method for producing fluorine because fluoride ions (F-) are extremely weak reducing agents.

In the industry, copper or steel electrolyzers are commonly used to electrolyze molten potassium hydrogen fluoride (i.e., KHFz, which is an equimolar mixture of KF and HF) to produce fluorine, and the anhydrous hydrogen fluoride should be continuously supplemented during electrolysis, and the hydrogen (H2) and fluorine (F2) gases produced by electrolysis should be introduced in time.

So is electrolytic oxidation the only method for producing fluorine?

In 1986, exactly 100 years after Muwasan completed the electrolysis of fluorine, chemists finally succeeded in producing fluorine by chemical method, which was also an important breakthrough in chemistry.

Chemical fluoride production is generally carried out in three steps:

The first step is to synthesize potassium hexafluoromanganese by reacting potassium permanganate with potassium fluoride and hydrogen fluoride.

The second step is to react with antimony pentachloride and hydrogen fluoride to synthesize antimony pentafluoride.

In the third step, fluorine elements are prepared by reacting potassium hexafluoromanganese with antimony pentafluoride.

Fluorine is a yellowish gas with an unpleasant odor.

It has a variety of industrial uses, for example, fluorine reacts with alkali (2% NaoH) to produce oxygen fluoride, oxygen fluoride (OF2) is a very strong oxidant, it can release a large amount of heat energy when oxidizing other substances, and because of its small molar mass, it is an excellent rocket fuel. Uranium hexafluoride is a volatile uranium compound that is commonly used to enrich nuclear fuels... Uranium-235.

Sodium fluoride (NaF), on the other hand, is commonly used as rat poison.

Organic fluorides have unique properties. For example, fluorocarbons are chemically stable, odorless and non-toxic, such as Freon-12 (CCl2F2) is a well-known refrigerant and Bolon (CBr2F2) is a highly effective fire extinguishing agent.

PTFE is stable and particularly corrosion-resistant, so it is known as the "king of plastics".

Li Dabao knows better than anyone else about fluorine element, and he also knows two ways to make fluorine element.

One is, of course, the electrolysis method.

The other is the chemical approach.

This Wenshan is considered to have hit the muzzle of the gun.

However, Li Dabao didn't know that Wen Shan didn't know anything about fluorine element, he had been studying fluorine for ten years.

He had already found a way to make fluorine by electrolysis, and the final experiment was missing.

That's why he dared to compare with Li Dabao.

Li Dabao probably doesn't even know what fluorine elemental is, and what most people don't know is that this fluorine element is toxic.

It's better to poison Li Dabao to death.

Then he will become the biggest joke in the world.