"It turned out to be radon. Kaichi looked at the separated gas with some surprise, "I finally found a radioactive element." There must be other radioactive elements in this, and then separate them. ”

Uranium may be the most well-known radioactive element, but radon is the radioactive material that people are exposed to for the longest time. The half-life of radon is very short, but it is very common in nature, especially in stone, and if things like marble are used in home decoration, there are requirements for the radon content.

However, the half-life of radon is very short, the longest is only a little more than 3 days, and in chemistry papers, the longest occurrence of radioactive elements is based on the example of radon. The main source of radon is radium, the one discovered by Marie Curie, radium decays to produce radon, and radium is the decay of thorium, and thorium is the decay of uranium.

Following this line of thought, Jiayi really found uranium, radium, and thorium, and in the re-analysis of the gas, he found helium. After this long series of analysis, almost all of the radioactive elements in this cursed stone have been analyzed.

Among this stone, radium has the highest content, followed by radon, then helium, then uranium and thorium, and the uranium content that Jiayi is most concerned about is not high.

Jia Yi looked at the several elements that he separated in front of him, which almost formed a complete chain, according to the decay of uranium, thorium, radium, and radon all the way, and the alpha particles produced in the decay process captured electrons to form helium, and the alpha ray was the ray composed of the helium nucleus. Radon goes through several more decays, and the final result is lead.

"It seems that the organization that provided the cursed stone should have mastered the refining of the radioactive element, and there should be a radioactive element mine, most likely a uranium mine. Jia Yi muttered his guess quietly, and his saliva was about to flow.

If it weren't for the deliberate extraction, the content of radium and radon in this stone would not be so high, and the content of radium and radon in natural minerals is very weak, much lower than the content of uranium. It's just because radium and radon are the most radioactive and the most harmful to the human body, and after being purified in a targeted manner, there will be so many of these two components in this cursed stone.

However, their extraction methods should not be very powerful, although the content of radium in this is high, but it is also compared to natural minerals, all the radioactive materials combined, the content is less than 10%.

Jiayi despised them a little, and the extraction method was a little rough.

Compiled all the discoveries into a paper, and with helium, his ultra-low temperature experiments can go further, but unfortunately there is not much helium now, even if he purifies all the helium contained in the curse stone, the amount is too small to carry out the experiment.

Jia Yi can arrange an adsorption circle on the roof, and then use a wind system circle to constantly blow the wind over, using this method to continuously collect helium. However, the amount of helium in the air is so small that I don't know how long it will take to collect helium that can be used for experiments.

......

"Teacher, you made us study electrons, and we have made new discoveries. ”

As soon as Jia Yi came out of the laboratory, Sankochia hurriedly ran over and said excitedly.

"Oh, what kind of experiment?" Kaichi was a little curious, not knowing what they had discovered. Could it be that they confirmed the existence of the nucleus by bombarding the gold leaf with electrons?

When he arrived in the laboratory, Jia Yi and the others showed him the results of their research, and after turning off all the lights, the vacuum tube was also covered with a brown envelope, and then the ray emitter was activated, and the electron stream was ejected, and immediately, a light spot appeared on a fluorescent plate in the distance. It is two or three meters away from the discharged vacuum tube.

"This is..."Kaichi was a little surprised, this should be X-rays, X-rays are a by-product of studying cathode rays.

"We think it's a new kind of ray, and cathode rays can only travel a short distance in the air," said Lorel. This is most likely another particle that makes up atoms in addition to electrons. ”

Because Kaichi first characterized electrons, they subconsciously thought that X-rays were also a kind of particle, and they also linked it to the atomic structure.

"That's not a very clever conclusion. Kaichi looked at them with a smile, "You should first conduct experiments to prove if this is a particle." It is not okay to think that this is a particle inside an atom that is related to electrons. This ray is much more penetrating than an electron. ”

A few students were stunned and felt a little ashamed, but Jia Yi didn't blame them, their excitement was understandable, after all, it was a new discovery that they had discovered independently.

"You can continue to study this kind of ray, there should be a lot of potential to be tapped, but first you should prove whether it is a particle or an electromagnetic wave, not a guess. How about adding up the research assignments I've assigned you?"

The Brownian motion and ultra-low temperature that Jiayi asked them to study were the serious tasks of the institute, and electrons and X-rays could only be regarded as accidental discoveries.

The two sides quickly explained their current progress, and Lorrell said: "For the calculation of Brownian motion, we have conducted statistical research on the diffusion coefficient of sugar water, and calculated the diffusion coefficient of particles by the statistical average of the displacement of particles in a certain direction per unit time, that is, the root mean square value. This formula is the inevitable consequence of the seemingly irregular Brownian motion obeying the laws of molecular thermal motion. It not only proves the correctness of the teacher's statement about the thermal motion of molecules, but also can be used to determine the size of atoms. ”

Jia Yi took over the experimental data, and was happy in his heart, the completion of this experiment represents that the foundation of thermodynamics has been solidified, and in his spiritual sea, the cognitive world that has begun to solidify has been further condensed. In the spiritual sea, a torrent of heat seemed to appear.

"Yes, this further confirms the existence of atoms, and what kind of spirituality can already be swept into the garbage. Lorrell, you can continue to study and use this formula and theory to accurately determine the mass of atoms. ”

In fact, in his previous life, he had never heard of Spiritualism, because the influence was so small that it was not introduced in the textbooks, and he thought it was a transitional theory unique to this world.

On the other side, Travis looked a little sullen, and said in a dull voice: "We are now in a dilemma for the research of low temperatures, although you have obtained liquid hydrogen, but there is no way to explore lower temperatures, not to mention obtaining absolute zero, even if you want to get close now, it is impossible to get close." ”

Jia Yi had foreseen this, but Travis didn't know it, and they thought that they could really get absolute zero through various means.