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by Daniel_Newby 4758 days ago
> The reactions stop at 56 because Iron has the highest binding energy of any element ...

Not exactly. Nickel-56 is produced in great abundance by the nuclear fusion of silicon. It then decays rapidly to cobalt-56, which then decays quickly to iron-56. The element with the highest binding energy is nickel-62, but it is not as easily formed during a supernova explosion.