But Yang Meng took into account the situation in the Rutan system,

Even the heavy elements before uranium may not account for a large proportion.

According to the theory of the formation of matter in the universe known to mankind,

Most of the heavy elements known to mankind are related to stars.

Stars through fusion, starting from hydrogen, the first element of the periodic table, and fusing to the second element, helium,

Then through the pp chain reaction, the third element lithium is produced, but because the atomic characteristics of lithium are difficult to retain inside the star,

will continue to join the chain reaction and continue to produce the elements on the fourth periodic table......

After that, step by step polymerization to carbon,

At this time, the nuclear fusion reaction is due to the energy level,

will enter the cycle of carbon, nitrogen and oxygen to continue to produce elements after the periodic table,

However, stellar fusion elements cannot continue to fuse forever, and the entire periodic table is fused.

As the fusion energy level rises, the required fusion environment becomes more and more terrifying.

A star of the magnitude of the Sun,

Helium, the second element of the periodic table, cannot be suppressed, and a terrifying helium flash will erupt, scaring the earth so much that it can only wander.

Not to mention the elements behind the periodic table,

In the final analysis, a fusion reaction is to forcibly press two atoms together.

And the elements behind the periodic table are difficult to match.

Until the 26th element of the periodic table, iron,

When nuclear fusion reaches the level of iron,

Due to the atomic structure of iron,

To press other elements into iron,

The energy pressed together has begun to exceed, and the energy released by pressing the iron together,

At this time, the star will also reach the point of its lifespan.

As for the elements after iron,

Humans can only speculate on what they know and collide with particles.

Although iron is difficult to polymerize after that,

But it's not without the possibility of continuing to rub it into the next element,

And there is more than one possibility of this,

From the undecided Big Bang to supernova explosions, neutron stars, or black holes with accretion matter,

It has been calculated that when this happens, the instantaneous energy generated is enough to continue to match the iron and produce the elements after the periodic table.

It's a pity that the elements that continue to be produced have some unstable existence.

Because it is achieved through violent integration, there will inevitably be resistance.

When the 43rd element technetium is reached, the first atom on the periodic table has a tendency to divorce due to arranged marriages.

that the so-called fission,

Of course, fission is not an instantaneous process.

Rather, there is a cooling-off period for divorce, which is the half-life of radioactive elements.

It's just that the cooling-off period for divorce of element 43 is only a few million years.

And the divorce process is not so smooth,

There will inevitably be fighting, such as high-altitude projectiles, which will make the fission radioactive.

Once human beings come into contact with elements thrown by fission elements, the end is often very innocent and painful.

Marriage will eventually come to an end, and the cooling-off period for divorce will eventually end.

Technetium after a successful divorce,

It will change into its previous appearance, such as technetium, which was composed of molybdenum and deuterium before marriage, and then separate molybdenum and deuterium again.

Compared with the 4.5 billion-year-old mother of the earth, the short period of millions of years can only be regarded as a passing cloud.

Therefore, the element technetium is almost non-existent on the earth.

Only in other radioactive minerals can trace traces of technetium in second marriage, after all, the radioactive elements after technetium will also divorce!

Thankfully,

The half-life of the radioactive elements after that is not always so short,

For example, the cooling-off period for the vast majority of depleted uranium divorces is tens of billions of years.

This is what made it possible for humans to discover this element on Earth.

In addition to uranium, there are several radioactive elements that have a long half-life.

can think of these Yang Meng secretly frowned,

Before he detected the situation on the planet Rutan B,

Don't say it's other radioactive elements,

Even this depleted uranium, which has a long half-life, is hardly found.

According to previous speculation, this is also related to the predecessor of Rutan,

After all, in the current universe, most of the stars are no longer the original stars of the universe.

For example, the sun is a young existence in the universe, and this young star is likely to be formed by the reaggregation of nebula material left after the previous supernova explosion.

The age of the planet is nearly 10 billion years,

And it's so small, it may not have been big in a previous life,

The amount of heavy elements produced by supernovae has a lot to do with the size of the previous stars.

One can imagine the resource situation in the Rutan system.