If we combine two carbon-12 atoms in a fusion process, then we get the element Mg (magnesium) atomic no. of Mg = 12.
Fusion would be the joining of two smaller nuclei to form a larger as well as heavier nucleus, whereas fission is the breaking of a heavy nucleoplasm into lighter nuclei. Energy was absorbed or released as a result of fission as well as fusion.
A magnesium-24 nucleus (Z = 12, A = 24) has the same nucleons as two carbon-12 nuclei (Z = 6, A = 12). The reaction is therefore a fusion of two carbon-12 nuclei, and no other particles are produced:
126C+126C→2412Mg
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