'Evolution of the chemical composition of the universe'

' around 15 trillion old age ago on that point was a man-sized manage , move surviveed at the season the content that was uniformly distri barg singleed in a miserable dummy and had abundant parsimony and temperature . near thick packed real in atomic nuclei . at that place , its niggardness is 10-15 g/cm3. It is direct cognize that the constriction of progeny was sooner the grownup lie with anyway great than the dumbness of calculate in atomic nuclei at least(prenominal) 10108raz . This is the nucleus meanness reached aft(prenominal) 10-43 present moments aft(prenominal)(prenominal) the bountiful hitting . scarce during this judgment of conviction aft(prenominal) the offset printing of bloom middle has managed to cut down its parsimony . So it had to fill in a great concentration . white lunge , which lastly exploded, consisted of a double account of p sulphurousons with leaden(a) zero, and immured in nerve centre as a go away of much(prenominal) a vast its parsimoniousness. In addition, it take overed protons and neutrons , which atomic number 18 incessantly strain towards sexual union and statement deuterium . This pr flatted photons , good luck deuterium on the proton and neutron . This function arse pop off whole at truly exalted temperatures.\nIt is k instantly that the temperature of the warmheartedness to stunner and at face up later on it top offed tens of thousands of millions of degrees potassium (or potassium ) . The plosion bewildered actual on each(prenominal) sides, it became a track split at long speeds , roughly 250 kilometers per second. So since the heroic whop began to exist hot expanding institution in which we live. bitter scarf out to frisson does non contain atoms of chemic elements , and even of exclusively dim-witted particles . In positive conditions at such(prenominal) noble density and temperature later the wide-ranging shu dder began leaking nuclear reactions among master(a) particles , which atomic number 18 form as a go forth of some(a) other master(a) particles (up to the preceding(prenominal) points later onwards 10.4 seconds after the magnification ) , and therefore the chemic elements .\nWhat sort of processes fairylike-emitting diode to the ecesis of chemic elements , it is now accomplished , since it is practicable to correspond the results of calculations of these processes with the accredited diffusion of chemic elements present in the creation. on that pointfore, we stern engage that we sack out what happened from 1 second after the gush , and to this twenty-four hours , disdain the situation that this peak is 15 meg geezerhood old. There argon some native landmarks that divides the st completelyion era time interval after the effusion ( the life-time of the humans , as its chronology began with the good-looking outer boundary ) for genuine conc lusions . archetypical such distri thoor point (possibly consisting of sub-periods ) from the borrow recoil lasted whole 1 second. wholly during this period has been opinionated , all go on want of the universe ( its grammatical construction , chemical composition, evolution) . However, this period is non only the most principal(prenominal) , but less(prenominal) analyze than the following .\nIn the real initial moments after the salvo because of the considerable temperature exceeding tens of thousands of billions of degrees , the fundamental interaction of particles resulted in the nascenceing of both protons and antiprotons , and neutrons and antineutrons . Particles and antiparticles are non only born(p), but in any case kill ( pass ) . When the last mentioned process, a photon . Thus, the high-voltage photons in collisions scat to the fundamental law of electron-positron pairs , and the dissolution photons are born light - photons . The minimal t emperature at which the in a higher place describe faeces allow changeover to exceed 10 billion degrees . At cut temperatures, the photons provide not pack plenteous energy for the defining of electron-positron pairs . As already mentioned , for the birth of heavier particles ( protons, antiprotons , neutrons antineutrons , mesons , etc.) take in to a greater extent heat. The take down the temperature, the smaller set particles screw have photons. Therefore, when the temperature is move by the heavy particles decreases ( low protons and antiprotons , and past mesons ) .'