 
 <prompt> "Which isotope appear first for di decay sequence, neptunium-237 or uranium-233? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context:" <response>: ```Natural uranium dey consist of three major isotopes: uranium-238 (99.28% natural abundance), uranium-235 (0.71%), and uranium-234 (0.0054%). All three dey radioactive, dem dey emit alpha particles, except say all three of these isotopes get small probabilities of undergoing spontaneous fission, instead of alpha emission. There dey also five other trace isotopes: uranium-239, wey dey form wen 238U undergo spontaneous fission, wey release neutrons wey another 238U atom go capture; uranium-237, wey dey form wen 238U capture neutron but come emit two more, wey go come decay to neptunium-237; uranium-233, wey dey form for the decay chain of that neptunium-237; and finally, uranium-236 and -240, wey appear for the decay chain of primordial plutonium-244. Dem dey expect say thorium-232 fit undergo double beta decay, wey go produce uranium-232, but this one never still dey observed experimentally.``` 