Question:
The number of nodal surfaces present in '4s' orbital is
The number of nodal surfaces present in '4s' orbital is
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Total nodes = $n - 1$. For $s$-orbitals, all nodes are radial (nodal surfaces).
Updated On: Apr 27, 2026
- three
- one
- two
- zero
- four
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Radial nodes (nodal surfaces) in an orbital are given by the formula $n - l - 1$.
Step 2: Meaning
For 4s: Principal quantum number ($n$) = 4; Azimuthal quantum number ($l$) = 0.
Step 3: Analysis
Nodes = $4 - 0 - 1 = 3$.
Step 4: Conclusion
Hence, correct answer is three.
Final Answer: (A)
Radial nodes (nodal surfaces) in an orbital are given by the formula $n - l - 1$.
Step 2: Meaning
For 4s: Principal quantum number ($n$) = 4; Azimuthal quantum number ($l$) = 0.
Step 3: Analysis
Nodes = $4 - 0 - 1 = 3$.
Step 4: Conclusion
Hence, correct answer is three.
Final Answer: (A)
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