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Originally Posted by GUILLE Are you saying that all the other elements have come out of fussions and chemical reactions of/from hydrogen??? |
that is correct. Light nuclei fuse (fusion) and heavy nuclei split (fission), both processes release energy basing on the stability of binding energy curve of nuclei. The most stable nuclei is at iron-56 (26 protons and 30 neutrons).
Nature seems to minimize the expenditure of energy such that light ones tend to fuse and heavy ones tends to split and the minimum energy for stability is at the middle of the periodic table of elements where iron is located.