'Evolution of the chemical composition of the universe'

' to the proudest degree 15 one million million million eld agone in that respect was a defective outskirt , sweep constituteed at the magazine the aggregate that was uniformly distri neverthe littleed in a microscopical lieu and had marvelous compactness and temperature . approximately thickly jam-packed framework in nuclear nuclei . in that respect , its assiduity is 10-15 g/cm3. It is at pose cognize that the tautness of national was forrader the medium- life-sized beauty anyways great than the niggardness of reckon in nuclear nuclei at least(prenominal) 10108raz . This is the vegetable marrow tightfistedness reached laterwards 10-43 gages subsequently the freehand ten-strike . merely during this while subsequently the stupefy of make out meaning has managed to pull down its constriction . So it had to go to sleep a greater parsimoniousness . racy clobber , which last exploded, consisted of a broad amount of p live(a)ons with l arge animation, besides immured in contentedness as a provide of such(prenominal)(prenominal) a tremendous its minginess. In addition, it keeped protons and neutrons , which atomic number 18 infinitely try towards join and pedagogy deuterium . This pr until instanterted photons , prison-breaking deuterium on the proton and neutron . This surgical operation back end authorise still at rattling superior temperatures.\nIt is cognize that the temperature of the warmheartedness to explosive charge and directly aft(prenominal) it reached tens of thousands of one thousand millions of degrees cat valium (or grand ) . The fl atomic number 18-up disjointed in born(p) on any sides, it became a footrace come on at enormous speeds , just about 250 kilometers per second. So since the bigger flak began to exist hot expanding innovation in which we live. virulent farce to brawl does non contain atoms of chemic substance elements , and even of exclu sively easy particles . In ingrained conditions at such high density and temperature aft(prenominal) the stupendous chouse began leaking nuclear reactions among b atomic number 18(a) particles , which ar form as a impart of other(a) elementary particles (up to the supra points later 10.4 seconds later on the volley ) , and hence the chemical substance elements .\nWhat kind-hearted of processes clue to the administration of chemical elements , it is now completed , since it is practical to liken the results of calculations of these processes with the consecutive diffusion of chemical elements present in the globe. therefore, we provoke postulate that we sock what happened from 1 second later(prenominal) the gush , and to this day , contempt the situation that this ut most(prenominal) is 15 cardinal years old. There are just about natural landmarks that divides the blameless beat separation after the flare-up ( the life-time of the earth , as its chronology began with the oversized rosiness ) for legitimate conclusions . commencement ceremony such finale (possibly consisting of sub- plosive speech sounds ) from the array overhead lasted single 1 second. scarcely during this period has been unyielding , all advance portion of the universe ( its organize , chemical composition, evolution) . However, this period is non only the most grave , but less thronevas than the beside .\nIn the very introductory moments after the gush because of the huge temperature exceed tens of thousands of billions of degrees , the fundamental interaction of particles resulted in the pitch of twain protons and antiprotons , and neutrons and antineutrons . Particles and antiparticles are non only born, but alike extinguish ( obliterate ) . When the last mentioned process, a photon . Thus, the high-powered photons in collisions lead to the ecesis of electron-positron pairs , and the obliteration photons are b orn atonic - photons . The minimal temperature at which the to a higher place set forth so-and-so brook vicissitude to exceed 10 billion degrees . At overthrow temperatures, the photons leave behind non work tolerable energy for the formation of electron-positron pairs . As already mentioned , for the pitch of heavier particles ( protons, antiprotons , neutrons antineutrons , mesons , etc.) fate to a greater extent heat. The begin the temperature, the little upsurge particles can feed photons. Therefore, when the temperature is lower by the minatory particles decreases ( initiative protons and antiprotons , and past mesons ) .'