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Protactinium-230 is a radioactive isotope of protactinium. It has 91 electrons and protons and 139 neutrons. It has a half life of 17.4 days. After a beta minus decay it turns into Uranium-230. It is not found in nature because it is highly unstable and has a half life of only 17.4 days. It has a mass of 230.034541 grams/mole.