* Atomic Number: Uranium has an atomic number of 92. This means it has 92 protons in its nucleus.
* Mass Number: The most common isotope of uranium is uranium-238. The mass number tells us the total number of protons and neutrons in the nucleus. So, uranium-238 has 238 - 92 = 146 neutrons.
Therefore, the nucleus of a uranium-238 atom contains a total of 92 protons + 146 neutrons = 238 particles.
