Answer : The number of neutrons in an atom U-233 is, 141 neutrons.
Explanation :
The given atom is, U-233
The atomic mass number of U = 233
The atomic number of U = 92 (from the periodic table)
Now we have to determine the number of neutrons in U-233.
Number of neutrons = Atomic mass number - Atomic number
Number of neutrons = 233 - 92 = 141
Therefore, the number of neutrons in an atom U-233 is, 141 neutrons