Question:medium
The number of neutrons in \(^{238}U\) is
The number of neutrons in \(^{238}U\) is
Show Hint
To calculate the number of neutrons in an isotope, subtract the atomic number from the mass number.
Updated On: Jan 15, 2026
- 146
- 92
- 330
- 238
Show Solution
The Correct Option is A
Solution and Explanation
The neutron count in an isotope is determined by:
\[
\text{Neutrons} = \text{Mass number} - \text{Atomic number}
\]
For \(^{238}U\), with an atomic number of 92:
\[
\text{Neutrons} = 238 - 92 = 146
\]
Therefore, the answer is 146.
Was this answer helpful?
0
Top Questions on Atomic Structure
The wavelength of spectral line obtained in the spectrum of Li$^{2+}$ ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is
- JEE Main - 2026
- Chemistry
- Atomic Structure
- Among the following, the CORRECT combinations are
A. \( \mathrm{IF_3} \rightarrow \) T-shaped (\( sp^3d \))
B. \( \mathrm{IF_5} \rightarrow \) Square pyramidal (\( sp^3d^2 \))
C. \( \mathrm{IF_7} \rightarrow \) Pentagonal bipyramidal (\( sp^3d^3 \))
D. \( \mathrm{ClO_4^-} \rightarrow \) Square planar (\( sp^2d \))
Choose the correct answer from the options given below:
- JEE Main - 2026
- Chemistry
- Atomic Structure
Spherical node shown in figure-1 is best represented by which point in figure-2.
- JEE Main - 2026
- Chemistry
- Atomic Structure
- The energy of first (lowest) Balmer line of H atom is \(x\) J. The energy (in J) of second Balmer line of H atom is:
- JEE Main - 2026
- Chemistry
- Atomic Structure
- Want to practice more? Try solving extra ecology questions todayView All Questions