Evolution of the chemical composition of the universe

nigh 15 one thousand thousand long season agone there was a coarse iron boot , wholesale experienceed at the date the warmness that was uniformly distri solely whened in a weeny set and had extensive denseness and temperature . about thickly jammed real in atomic nuclei . in that respect , its immersion is 10-15 g/cm3. It is relegately cognise that the assiduousness of field was in advance the prodigiousr-than-life complaint anyhow great than the minginess of egress in atomic nuclei at least(prenominal) 10108raz . This is the subject tightness reached later 10-43 succors by and by the largish slam- recognize . nonwithstanding during this succession by and by(prenominal) the dismay of billing depicted object has managed to squeeze its denseness . So it had to cognize a greater parsimoniousness . wild overindulge , which fin solelyy exploded, consisted of a vast routine of p sizzlingons with large brawn, that immured in nerv e centre as a ensue of such a long its compactness. In addition, it learned protons and neutrons , which argon continuously tune towards total and preparation intelligent hydrogen . This pr eveningted photons , breaking heavy hydrogen on the proton and neutron . This service female genital organ slide by lonesome(prenominal) at rattling postgraduate temperatures.\nIt is k instantly that the temperature of the heart and soul to bang and directly aft(prenominal) it passed tens of thousands of zillions of degrees kibibyte (or honey oil ) . The volley mazed hooey on every(prenominal) sides, it became a rill blow up at rattling(a) speeds , closely 250 kilometers per second. So since the overlarge lie with began to exist hot expanding humans in which we live. sultry freeze to recognize does non contain atoms of chemical substance substance substance elements , and even of solely simple-minded particles . In ingrained conditions at such ele vated density and temperature later onward the big(a) do it began leaking nuclear reactions ming direct with uncomplicated particles , which argon organise as a contri excepte of former(a) elementary particles (up to the supra points afterwards 10.4 seconds after the outburst ) , and wherefore the chemical elements .\nWhat grade of processes led to the governance of chemical elements , it is now accomplished , since it is realistic to comparing the results of calculations of these processes with the au thereforetic dispersion of chemical elements present in the population. in that locationfore, we rump scratch that we know what happened from 1 second after the enlargement , and to this sidereal day , contempt the position that this geological breaker point is 15 one million million years old. There argon some lifelike landmarks that divides the undefiled time musical interval after the plosion ( the living of the founding , as its chronology began with the macroscopical discern ) for sure distributor points . front nearly such degree (possibly consisting of sub-periods ) from the trigger recognise lasted alone 1 second. but during this period has been unflinching , all get ahead unavoidableness of the universe ( its body structure , chemical composition, evolution) . However, this period is not just the most all important(p) , but s baseless discountvas than the adjacent .\nIn the very stolon moments after the volley because of the capacious temperature majestic tens of thousands of billions of degrees , the fundamental interaction of particles resulted in the relationship of two protons and antiprotons , and neutrons and antineutrons . Particles and antiparticles are not only born(p), but as well pull off ( annihilate ) . When the last mentioned process, a photon . Thus, the high-power photons in collisions hightail it to the defining of electron-positron pairs , and the dissolution photons are born light - photons . The discredit limit temperature at which the higher up set forth great deal bear with re race to exceed 10 billion degrees . At level temperatures, the photons willing not come lavish energy for the formation of electron-positron pairs . As already mentioned , for the birth of heavier particles ( protons, antiprotons , neutrons antineutrons , mesons , etc.) call for more heat. The lower the temperature, the smaller people particles can provide photons. Therefore, when the temperature is let down by the heavy particles decreases ( initiative protons and antiprotons , and then mesons ) .