Uranium Is a Metallic Element That Is Used in Nuclear

Multiple Choice

Uranium is a metallic element that is used in nuclear reactors and nuclear weapons. The vast majority of uranium found on Earth is in the form of uranium-238, an isotope with a mass number of 238, while the uranium that is used for nuclear reactors and weapons is uranium-235, an isotope with a mass number of 235.
-If the atomic mass of uranium is 92, how many neutrons does an atom of uranium-235 have in its nucleus?

A) 92
B) 143
C) 146
D) 235