Explain the daughter isotope after the fourth emission

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In the decay series that starts with uranium-238, the first four steps consist of the emission of an alpha-particle, two beta-particles, and then another alpha-particle. What is the daughter isotope after the fourth emission? 1) U-234 2) Th-230 3) Th-234 4) Ra-230 How would I figure that out?

Reference no: EM13492320

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