Question

1. the fuel most commonly used in fission reactions is ____.

○ u-238
○ np-239
○ u-235
○ pu-239

Explanation:

Uranium-235 (U-235) is the most commonly used fuel in nuclear fission reactions because it readily undergoes induced fission when bombarded with slow neutrons, sustaining a chain reaction. U-238 is more abundant but does not easily undergo fission, Np-239 is a short-lived intermediate isotope, and Pu-239 is a man-made fissionable material but less commonly used as a primary fuel compared to U-235.

Answer:

B. U-235