All atoms of uranium have the same

(1) mass number

(2) atomic number

(3) number of neutrons plus protons

(4) number of neutrons plus electrons

All the atoms of Uranium have the same atomic number. The atimic number is given by the sum of the number of neutrons (N) and the number of protons (P). There exists many isotopes of Uranium, but in all the atomic number remains the same. In some isotopes, the number of protons are different and in some the number of protons are different.

Although Uranium (U) comes in many isotopes, Uranium has the same atomic number which is 92. The three naturally occurring isotopes of Uranium includes: U-233, U-236-, U-232. Other isotopes of Uranium are U-235 and U-238. All isotopes of Uranium comes in different atomic masses, yet, all atoms of Uranium will always be 92.