For humans, when there is a situation of green clouds covering the top of the head,

That must be a bad sign,

The meaning of green clouds in the earth's environment generally represents the leakage of highly toxic chemicals.

One of the most representative is chlorine.

Chlorine is a yellow-green highly toxic and corrosive gas,

If a creature like a human accidentally inhales chlorine gas,

That would be wreaking havoc from the mouth to the lungs. Eventually, it leads to a collapse of the respiratory system.

It can be said that chlorine is an extremely dangerous substance for human beings.

And Yang Meng saw that the entire planet of Planet E was wrapped in green clouds, and the first substance that came to his mind was chlorine.

But if it's just chlorine, he can still accept it,

After all, human beings can already stay for a short time on a sulfuric acid planet with a hellish environment like Venus.

As long as planet e does not have an average surface temperature of up to 400 degrees Celsius like Venus,

The entire atmosphere is filled with extremely corrosive sulfuric acid, and volcanic activity is still very high, so what else can he try on Planet E.

And what really worries him is:

It's not chlorine that gives Rutan E its intense green color, but another element that makes people feel scared.

What is the most dangerous substance for humans?

Different human beings, because of different knowledge, will give different answers,

But if you ask, what do researchers who are engaged in chemistry and chemical industry think is the most dangerous substance?

Most researchers will point to an element and the various compounds that evolve from that element.

"How is it that the planet's atmosphere is so high in fluorine?"

Looking at the list of detection data, this element that makes the heart beat faster of chemical scientists,

Yang Meng was both worried and a little puzzled.

The appearance of fluorine can be said to have blocked Yang Meng's plan to explore Planet E to the greatest extent.

In the past, he valued Planet E more than Planet D.

Planet e is only 9.3 times more massive than Earth,

Although it is only a little less than the mass of the Earth on Planet D,

But it is the reduction of the mass of this Earth that makes the shape of Planet E closer to that of a rocky planet.

As we all know, planets can have the thickness of the atmosphere, which has a lot to do with the gravitational attraction and magnetic field of the planet.

The more massive a planet is, the greater its gravitational pull and the thicker its atmosphere.

In some kind of planetary formation hypothesis:

As the planets continue to coalesce and increase in mass during the formation process, the thickness of the atmosphere continues to increase.

The pressure beneath the atmosphere also began to intensify, after which the strong pressure liquefied the gas, forming a liquefied ocean that covered the entire planet.

Therefore, although the gas giant is crowned with the word gas,

But the gas giant is not made up of a mass of gas.

After a long exploration of Jupiter, which is closest to them, it was found that

The vast majority of material on gas giants like Jupiter is made of liquid.

And Jupiter's core, like the Earth, has a molten iron-silicon core, and outside the core is a fluid layer composed of high-temperature liquid helium and liquid metallic hydrogen.

This part occupies the main structure of Jupiter,

And above the main body is a cloud layer with a thickness of more than 5,000 kilometers,

Although 5,000 kilometers seems to be an exaggeration, it is close to catching up with the radius of 6,371 kilometers of the earth.

But for Jupiter, which is 1,316 times the size of the Earth,

This thickness is just a layer of paper wrapped in the table tennis ball.

And this model of the celestial body, from the inside out, from the metal core upwards to the topless liquid ocean, to the thick atmosphere, is the traditional structure of a gas giant.

According to Yang Meng and Xiaoyi's previous calculations,

The atmosphere of 200 kilometers thick on planet d below them is already the minimum limit of gas giants.

Planet E will have a thinner atmosphere because its mass is smaller than that of planet D.

Under this premise, Xiao Yi speculated that the atmosphere of Planet E was no longer able to completely liquefy the surface of the planet.

Maybe the bare hard surface on Planet E allows him to find heavy metal elements.

But what he never expected was that there was so much fluoride in the atmosphere of Planet E!

Fluorine is ranked ninth in the periodic table,

Because it is close to the front of the periodic table, fluorine, as a lighter element, is very common in the universe.

It ranks 13th in the proportion of earth content.

It's just that because fluorine is extremely reactive, it can only exist in the form of compounds with other elements, and it is difficult for a single fluorine element to exist on the earth.

It is precisely because of the activity of fluorine that it is easy to react with various elements that make up human beings.

Therefore, for carbon-based life forms such as humans, fluorine gas is a highly toxic gas.

In the early days of mankind,

Almost all chemists who have studied fluorine have died for the scientific and technological progress of mankind.

The fluorine element is also known as the chemist Grim Reaper.

Even in today's era of advanced science and technology, the research of fluorine still has to be very careful.

If you don't pay attention, it may cause very serious scientific research accidents.

And some of the compounds formed by such dangerous elements are also very dangerous.

In particular, some types of fluorine acid can easily corrode corrosion-resistant materials such as glass, oxidation-resistant metals, etc.

If there is a fluorine substance in the clouds of Planet E, which has this highly corrosive property,

It is also difficult for him to explore the planet, which is the root cause of his worries.

"But why does fluorine go to the atmosphere, and why does fluorine appear yellow on Earth, but how does it turn green on Planet E?"

These questions made Yang Meng puzzled again,

However, when you think of Titan in the solar system, rivers and oceans composed of hydrocarbons, and gasoline rain in the sky,

There will be such strange celestial bodies in the solar system,

It is not a strange thing to rain fluorine gas and fluoric acid on Planet E.

What he has to think about now is whether to go to Planet E for further exploration,

Faced with such a choice, Yang Meng pondered for a while, and then asked Xiao Yi about the news of the remaining detectors.

In addition to the two planets D and E, there are three smaller planets outside the Rutan system.

Although Yang Meng was not optimistic about these three planets, he still sent small probes to these three planets.

"Calculated to be a probe to the fifth planet?"

"I don't know what's going on there?"

Just when Yang Mengsi asked Xiao Yi about the situation, Xiao Guang floated in front of him at some point.

"I feel that there is some useful material in that direction!"

Hearing Xiaoguang's voice, Yang Meng immediately returned to his expression,

"Which direction?"

"Yes, there should be supplies there!"

Yang Meng looked in a direction outside the porthole under the guidance of Xiaoguang,

However, there are no big objects in that direction.

There is only one empty cosmic space:

"Wait, that direction is ......"

Yang Meng carefully identified it and found that there was a faint point of light there.