Final answer:
Bismuth (Bi) has 155 neutrons in its nucleus.
Step-by-step explanation:
Bismuth (Bi) is a chemical element with an atomic number of 83. To determine the number of neutrons in an atom of bismuth, we subtract the atomic number from the mass number. The mass number of bismuth is not provided in the question, but it is stated that the element has the same electron configuration as uranium-238 which has a mass number of 238. Therefore, the number of neutrons in bismuth would be 238 - 83 = 155.