The nucleus of Uranium-235 differs from a nucleus of a Uranium-238 in that Uranium-238 contains:
Correct answer: A. 3 more neutrons
- A. 3 more neutrons
- B. 3 more electrons
- C. 3 more protons
- D. 3 more ions
Explanation
Both are isotopes of Uranium, meaning they have the same number of protons (92). The mass number represents protons + neutrons. Therefore, U238 has 238 - 92 = 146 neutrons, which is 3 more than the 143 neutrons in U235.
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