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...
Atoms that are heavier than hydrogen were made by nuclear fusion after the big
bang. Initially, only the lightest element, hydrogen, was present.
Oct 22, 2009 ... An element is a pure substance made of atoms that are all of the same type. ... '
Big Bang', only the lightest elements were formed – hydrogen and helium ...
which allows elements heavier than iron, such as uranium and gold, ...
I think I understand your dilemma: you are wondering why, if high temperatures
and high .... You assume that heavier atoms at higher temperatures => lighter
particles at colder ted ... How were the heavy elements from iron to uranium
An answer to the question: How are elements heavier than uranium created? ...
We generally call the transuranics "man-made" elements because they are
normally not ... of how many neutrons it has) is hydrogen, an atom with two
protons is helium, etc. ... Earlier, we said uranium and other heavy atoms were
Jul 5, 2013 ... Practically all of these heavy elements were formed in generations of stars: ... the
Universe was made out of about 92% hydrogen atoms and 8% helium atoms ...
and why didn't more of the Universe become helium than it did?
Dec 2, 2010 ... Just what do astronomers mean when they say we're all made of star stuff ... All
except atoms of hydrogen and one or two of the next lightest elements. They
were formed even earlier, shortly after the Big Bang began 13.7 billion years ago.
.... But stars do form elements heavier than iron, including cherished .....
Nuclear fusion involves two atomic nuclei joining to make a large nucleus.
Energy is released ... A hyrdogen-1 nucleus is made of 1 proton. This can
combine ... Heavier elements than hydrogen and helium (up to iron) are formed.
Their relative abundance (by weight) was 75% hydrogen and 25% helium. ...
Second, the atoms were becoming packed more tightly, increasing the density, ...
(lower temperature and pressure) than the carbon-nitrogen-oxygen cycle. ... the
temperature and density to reach levels where C nuclei can fuse into heavier
www.haystack.mit.edu/edu/pcr/Astrochemistry/3 - MATTER/nuclear synthesis.pdf
In the very beginning, both space and time were created in the Big Bang. It
happened 13.7 ... how helium is made in our sun, the CNO cycle which explains
how hydrogen is fused in hotter stars, and the triple alpha process which
accounts ... Creating elements heavier than iron requires energy, it doesn't