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Example Questions
Example Question #1 : Fission And Fusion
The most common nuclear fuel used to produce a fission chain reaction in a nuclear weapon is:
Possible Answers:
Plutonium-238
Uranium-236
Uranium-235
Plutonium-240
Uranium-238
Correct answer:
Uranium-235
Explanation:
U-235 differs from U-238 in that U-235 is able to produce a fission chain reaction. U-238 is the most common isotope of uranium, with the U-235 isotope constituting less than 1% of natural sources. Uranium enrichment is the process by which U-235 is separated out, and it is this product that is most commonly used to manufacture nuclear weapons. Pu-239 is produced from U-238 and can be used for nuclear weapons as well, but Pu-239 is not an answer choice.
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