I may have goofed the neutrons & protons.
Which Elements Will Never Be Made By Our Sun?
Ethan Siegel

Yes, I think you did so please change the picture so it does not confuse people: elements are defined by number of protons while they may have more or less neutrons than their stable form, e.g. Zn (65).

So horizontal is increase in neutrons and vertical is increase in protons :)

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