jump to navigation

Genesis of the chemical elements I March 11, 2011

Posted by Searchable Content in Chemical Substances, Content, EN, Everything Changes.
add a comment

The things that make up the material world, consist of various combinations of about 100 chemicals. Nothing more than that.

Many questions echo through time.

The theory most widely accepted today by the scientific community says that everything that exists today …

matter, space and even time … came from a tiny point.

A tiny point. Amazing is not it?

Big Bang! This is the name of the famous theory that explains the evolution of the universe from the first moments today.

It is also the basis of other theories about the future of the universe.

For the Big Bang theory, if the whole universe came to a point, from a common start, …

… So all we know the history of the world and life, also appeared in the same place at the same time.

We can say that the idea that we all have a common origin finds support in the Big Bang theory.

One of the first men to formulate a theory that the universe would have originated from a “primeval atom” was a priest. The Belgian Monsignor Georges Lemaitre in 1927.

Einstein did not agree with Lemaitre to experimentally prove Edwin Hubble in 1929 that the galaxies are farther from each other fast.

However, if galaxies move away faster than ever, it is possible to imagine the reverse move, going back in time, to conceive the hypothesis that in the past, all would be united.

The union of all in a single point is the base of the Big Bang theory.

Then all the elements that make cities, objects and body of that person were one day together, otherwise, at the beginning of everything.

But to get here had to cross about 13.7 billion years of history and as you can imagine, much … same thing happened a lot during this time.

From time zero to a tiny fraction of a second after the Big Bang, all forces of nature were unified. It was called the Planck time.

The laws of physics as we know them today did not exist. And it was very, very hot.

All matter and energy in the universe were confined in a space roughly the size of the atom we know today.

One second after the big bang, the temperature had dropped to 10 billion Kelvins.

Everything happened very quickly. And there was was a soup of particles.

Protons, neutrons, electrons and various other particles were created and annihilated frantically.

The nuclei of the first chemical elements were created at this time.

At 3 minutes the temperature there had fallen to about “only” 1 billion Kelvins.

The universe was cold enough that protons and neutrons would be stable, and warm enough to allow fusion.

Protons and neutrons are fused one by one, creating the chemical elements present in the universe at 20 minutes of life were mostly hydrogen and helium.

The primordial nucleosynthesis lasted only 17 minutes!

After 20 minutes, the temperature was already too low to ignite nuclear fusion processes.

There was not time to form elements heavier than lithium.

And the temperature continued dropping … Downloading … Downloading …

Approximately 300,000 years after the big bang, the temperature reached 3000 Kelvins and was cool enough that the nuclei capture electrons to form atoms.

Follow

Get every new post delivered to your Inbox.