Home » Which isotope is used in the nuclear power plants to generate electricity? Atomic Structure MCQs Which isotope is used in the nuclear power plants to generate electricity? January 8, 2022 39 Views Q. Which isotope is used in the nuclear power plants to generate electricity? A. Uranium 235 B. Iodine 131 C. Cobalt 60 D. Uranium 238 Answer: Uranium 235