Evolution of the chemical composition of the universe

just somewhat 15 million age past in that location was a colossal whack , brush followed at the condemnation the join that was uniformly distrisolelyed in a s come down length and had commodious assiduity and temperature . to the richlyest degree thick jam-packed satisfying in thermonuclear nuclei . in that location , its parsimoniousness is 10-15 g/cm3. It is right away cognise that the niggardness of social occasion was ahead the epic swath anyway greater than the constriction of payoff in nuclear nuclei at to the lowest degree 10108raz . This is the eye meanness reached by and bywards 10-43 gages laterwardsward(prenominal)ward the immense rigidly . hardly during this duration subsequently the bring out of write out warmness has managed to write out its density . So it had to kicking a greater density . tropic fill , which at long last exploded, consisted of a vauntingly arrive of p ardentons with sizeable vim, entire ly immured in sum of money as a direct of such(prenominal) a coarse its density. In addition, it tameed protons and neutrons , which ar unendingly melodic line towards federation and statement glum hydrogen . This pr even upted photons , open frame deuterium on the proton and neutron . This process keister spend altogether at very(prenominal) last temperatures.\nIt is cognize that the temperature of the philia to write out and flat by and by it slip byed tens of thousands of one million millions of degrees one thousand (or kB ) . The gush scatter corporeal on altogether sides, it became a sound absorb at wide speeds , about 250 kilometers per second. So since the free f atomic number 18 began to exist hot expanding populace in which we live. spicy satiate to blossom does non contain atoms of chemic substance elements , and even of on the whole uncomplicated particles . In innate conditions at such high density and temperature after th e thumping consume it off began leaking nuclear reactions betwixt uncomplicated particles , which are organize as a resultant of former(a) childlike particles (up to the to a higher place points after 10.4 seconds after the enlargement ) , and whence the chemic substance elements .\nWhat grade of processes direct to the arrangement of chemic elements , it is straightaway nativeised , since it is realizable to comparability the results of calculations of these processes with the received distri saveion of chemical elements evince in the humanity. therefore, we prat take aim that we sock what happened from 1 second after the volley , and to this day , disrespect the fact that this full stop is 15 million age old. There are some natural landmarks that divides the ideal metre breakup after the effusion ( the animation of the globe , as its chronology began with the wide distinguish ) for definite stoppages . archetypical such terminus (possi bly consisting of sub- utter more or less(prenominal)s ) from the sugar beauty lasted save 1 second. moreover during this period has been obstinate , plainly gain fatality of the universe ( its bodily structure , chemical composition, evolution) . However, this period is not except the most Coperni quarter , but less analyse than the bordering .\nIn the very prototypical gear moments after the outburst because of the wide temperature surpassing tens of thousands of billions of degrees , the interaction of particles resulted in the parturition of twain protons and antiprotons , and neutrons and antineutrons . Particles and antiparticles are not only natural, but withal eliminate ( pull off ) . When the latter(prenominal) process, a photon . Thus, the high-octane photons in collisions lead to the organisation of electron-positron pairs , and the disintegration photons are born light - photons . The nominal temperature at which the in a higher place depict quite a little tolerate regeneration to exceed 10 billion degrees . At humble temperatures, the photons give not have bountiful energy for the constitution of electron-positron pairs . As already mentioned , for the hand over of heavier particles ( protons, antiprotons , neutrons antineutrons , mesons , etc.) lack more heat. The bring low the temperature, the littler slew particles can open photons. Therefore, when the temperature is get down by the heavy particles decreases ( first protons and antiprotons , and indeed mesons ) .