Identify the mass number and atomic number from the given isotope notation.
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Step 1: Identify the mass number and atomic number from the given isotope notation.
The notation for an isotope is $^{A}_{Z}\text{X}$, where $A$ is the mass number (protons + neutrons) and $Z$ is the atomic number (protons).
For the uranium nucleus $^{238}_{92}\text{U}$:
Mass number ($A$) $= 238$
Atomic number ($Z$) $= 92$
Step 2: Calculate the number of neutrons.
The number of neutrons is found by subtracting the atomic number from the mass number.
Number of neutrons $= A - Z$
Number of neutrons $= 238 - 92$
Number of neutrons $= 146$
Step 3: Compare the calculated value with the given options.
The calculated number of neutrons is 146, which corresponds to option B.
The number of neutrons in the nucleus of $^{238}_{92}\text{U}$ is $\boxed{\text{B) 146}}$.
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