Power Plant Engineering
The secondary fuel used in nuclear power plants is

U₂₃₅ and Th₂₃₂
U₂₃₃ and Pu₂₃₈
U₂₃₃ and Pu₂₃₉
U₂₃₅ and Pu₂₃₈

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Power Plant Engineering
Isotopes of same elements have

Different chemical properties and same atomic numbers
Different masses and different atomic numbers
Same atomic number and different masses
Same chemical properties but different atomic numbers

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