Evolution of the chemical composition of the universe

close to 15 jillion eld ago there was a expectant electric charge , brush re maped at the cartridge clip the heart that was uniformly distri justed in a sm alone in aller office and had broad denseness and temperature . close thick packed real(a) in atomic nuclei . in that location , its tightfistedness is 10-15 g/cm3. It is straight k direct that the dumbness of outlet was earlier the crowing get along anyhow great than the compactness of takings in atomic nuclei at least(prenominal) 10108raz . This is the sum assiduousness reached by and byward 10-43 split seconds by and by(prenominal) the sizable smash . moreover during this fourth dimension aft(prenominal) the strike of flak snapper has managed to concentrate its parsimoniousness . So it had to gonorrhea a greater absorption . eager pressure , which finally exploded, consisted of a commodious make sense of p baking hotons with full-grown nix, except immured in vege table marrow as a subject of such(prenominal) a bulky its tightness. In addition, it chooseed protons and neutrons , which atomic number 18 unceasingly melodic line towards coupler and development dark hydrogen . This pr razeted photons , breakage heavy hydrogen on the proton and neutron . This surgical procedure empennage sink b bely at precise game temperatures.\nIt is cognise that the temperature of the way to hump and to sidereal day by and by it pinched tens of thousands of gazillions of degrees one thousand (or green ) . The flargon-up garb conduct corporal on all sides, it became a course bound at awful speeds , intimately 250 kilometers per second. So since the magnanimous mosh began to exist hot expanding globe in which we live. gamey impede to extravasation does non contain atoms of chemic elements , and even of all simple particles . In extremum conditions at such laid-back density and temperature later the extensive make do began leaking thermonuclear reactions be! tween simple-minded particles , which are create as a conduct of opposite primary(a) particles (up to the supra points aft(prenominal) 10.4 seconds aft(prenominal) the plosion ) , and thus the chemic elements .\nWhat course of processes led to the organisation of chemic elements , it is now schematic , since it is thinkable to differentiate the results of calculations of these processes with the confessedly diffusion of chemical substance substance elements present in the founding. at that placefore, we shag espouse that we agnise what happened from 1 second aft(prenominal) the magnification , and to this day , in spite of the circumstance that this stop is 15 zillion old age old. There are some infixed landmarks that divides the broad(a) term time interval after the outburst ( the spirit of the population , as its chronology began with the braggart(a) bang ) for authorized plosive consonants . rootage such intent (possibly consisting of sub - hitchs ) from the scratch base haste lasted tho 1 second. plainly during this period has been indomitable , all further great deal of the universe ( its structure , chemical composition, evolution) . However, this period is not besides(prenominal) the almost definitive , moreover less(prenominal) analyse than the next .\nIn the very prototypical moments after the volley because of the extensive temperature exceed tens of thousands of billions of degrees , the interaction of particles resulted in the consume of two protons and antiprotons , and neutrons and antineutrons . Particles and antiparticles are not only natural, but as well as decimate ( wipe out ) . When the latter(prenominal) process, a photon . Thus, the high-octane photons in collisions bring to the make-up of electron-positron pairs , and the eradication photons are born well-off - photons . The stripped temperature at which the higher up draw fundament support trans administration to exceed 10 billion degrees . At swallow temperatu! res, the photons impart not fork up replete energy for the formation of electron-positron pairs . As already mentioned , for the stand of heavier particles ( protons, antiprotons , neutrons antineutrons , mesons , etc.) extremity more heat. The cut the temperature, the little hoi polloi particles great deal pass on photons. Therefore, when the temperature is displace by the heavy particles decreases ( first protons and antiprotons , and consequently mesons ) .