Some hydrogen remains on earth by chemically combining with oxygen and trapped as water, a substance essential for our planet's biology when the earth formed much of the hydrogen was combined with carbon as methane, ch4, however this is a comparatively rare substance today. Nucleosynthesis is the process by which heavier chemical elements are synthesized in the interiors of stars from hydrogen nuclei and other previously synthesized elements precisely which elements are involved in nucleosynthesis depends on the age and mass of the star. Primordial nucleosynthesis and the abundances of the light elements in the time period between about 100 seconds and 30 minutes after the big bang, but mostly with the first three minutes, the temperature and density of the universe were appropriate for the efficient synthesis of the light elements. Stellar nucleosynthesis refers to the assembly of the natural abundances of the chemical elements by nuclear reactions occurring in the cores of stars those stars evolve (age) owing to the associated changes in the abundances of the elements within. Apart from hydrogen and helium which are the products of big bang nucleosythesis all observed chemical elements heavier that helium (c, o, called metals by astronomers) are synthesised inside stars stellar nucleosynthesis provides clues not only to stellar evolution but also to space-time .
As the universe cooled, the neutrons either decayed into protons and electrons or combined with protons to make deuterium (an isotope of hydrogen) during the first three minutes of the universe, most of the deuterium combined to make helium. The term nucleosynthesis refers to the formation of heavier elements, atomic nuclei with many protons and neutrons, from the fusion of lighter elements the big bang theory predicts that the early universe was a very hot place one second after the big bang, the temperature of the universe was . Hydrogen fusion in the sun is a multistep reaction, but the net result is that four hydrogen atoms fuse into one helium atom (plus a bunch of junk). Big bang nucleosynthesis gamow, alpher and herman proposed the hot big bang as a means to produce all of the elements however, the lack of stable nuclei with atomic weights of 5 or 8 limited the big bang to producing hydrogen and helium.
Nucleosynthesis, production on a cosmic scale of all the species of chemical elements from perhaps one or two simple types of atomic nuclei, a process that entails large-scale nuclear reactions including those in progress in the sun and other stars chemical elements differ from one another on the basis of the number of protons (fundamental particles that bear a positive charge) in the atomic nuclei of each. Abundant element in the galaxy, though considerably less abundant than hydrogen and helium (principally produced in primordial nucleosynthesis) according to the. Apart from nuclear fusion in stars, there is also what is called as nucleosynthesis this is defined as the production or creation of new elements through the process of nuclear reactions in this process, as more and more particles fuse together, such as the atoms of hydrogen and helium in stars, the new product of . Nucleosynthesis requires a high-speed collision, which can only be achieved with very high temperature the minimum temperature required for the fusion of hydrogen is 5 million degrees elements with more protons in their nuclei require still higher temperatures.
If the matter in the universe contained just a hair over 12% neutrons and just a hair under 88% protons just prior to nucleosynthesis (the fusion into heavier elements), that means that all of those neutrons and and equal amount (just over 12% of the universe) of protons winds up becoming helium-4: a total of 24-to-25% of the mass, leaving 75-to-76% of the universe as protons, or hydrogen nuclei. The cosmic formation of atoms more complex than the hydrogen atom nucleosynthesis of he continued nucleosynthesis through fusion of hydrogen, helium, carbon . Nucleosynthesis the most abundant element in the universe is hydrogen, the second most abundant element is helium a great success of the big bang theory is to be .
Which shows the correct order of events during the process of nucleosynthesis 1hydrogen nucleus formed,isotope of hydrogen tritum formed,helium nucleus formed 2helium nucleus formed,hydrogen nucleus formed,isotope of hydrogen,tritium formed. Stellar nucleosynthesis is the process by which elements are created within stars by combining the protons and neutrons together from the nuclei of lighter elements all of the atoms in the universe began as hydrogen fusion inside stars transforms hydrogen into helium, heat, and radiation heavier . If the matter in the universe contained just a hair over 12% neutrons and just a hair under 88% protons just prior to nucleosynthesis stars fuse hydrogen into etc etc and dies once most of . During the era of nucleosynthesis, hydrogen atoms, with single-proton nuclei smash together under great pressure as a result, atoms are forced together, forging heavier elements, such as helium yet, such fusion could only continue until three minutes after the big bang.
Nucleosynthesis is the process that transmutes hydrogen into heavier chemical elements, and as the star collapses from its own mass, the star explodes in a supernova that throws the carbon and other heavier elements into space. Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons, primarily protons and neutrons the first nuclei were formed about three minutes after the big bang, through the process called big bang nucleosynthesis. The earliest nucleosynthesis took place for only a few minutes following the big bang that began the universe, creating nuclei of hydrogen (each hydrogen nucleus has 1 proton) and of helium (2 protons) and a tiny amount of lithium (3 protons). A key point is that the ratio of hydrogen to helium is extremely sensitive to the density of matter in the universe (the parameter that determines if the universe is open, flat or closed) the higher the density, the more helium produced during the nucleosynthesis era.
During nucleosynthesis, occurring from the first 3 to 20 minutes, the universe cools down to around a billion degrees, which is cool enough to allow protons and neutrons to combine and produce the first nucleons of helium and hydrogen. By the time the universe was three minutes old the process had basically stopped and the relative abundances of the elements was fixed at ratios that didn't change for a very long time: 75% hydrogen, 25% helium, with trace amounts of deuterium (hydrogen-2), helium-3, and lithium-7 big bang nucleosynthesis produced no elements heavier than lithium. Processes there are a number of astrophysical processes which are believed to be responsible for nucleosynthesis the majority of these occur in within stars, and the chain of those nuclear fusion processes are known as hydrogen burning (via the proton-proton chain or the cno cycle), helium burning, carbon burning, neon burning, oxygen burning and silicon burning. Nucleosynthesis the most abundant element in the universe is hydrogen, the second most abundant element is helium.