Question:
What is the number of node in 2s orbital?
What is the number of node in 2s orbital?
Show Hint
s-orbitals have only radial nodes; an ns orbital has $(n-1)$ radial nodes.
Updated On: Apr 30, 2026
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The Correct Option is B
Solution and Explanation
Step 1: Formula for Nodes
Total nodes = $n - 1$. Radial nodes = $n - l - 1$. Angular nodes = $l$.
Step 2: Identify Quantum Numbers for 2s
- Principal quantum number ($n$) = 2. - Azimuthal quantum number ($l$) = 0 (for s-orbital).
Step 3: Calculation
Radial nodes = $2 - 0 - 1 = 1$. Angular nodes = 0.
Step 4: Conclusion
The 2s orbital has 1 radial node.
Final Answer:(B)
Total nodes = $n - 1$. Radial nodes = $n - l - 1$. Angular nodes = $l$.
Step 2: Identify Quantum Numbers for 2s
- Principal quantum number ($n$) = 2. - Azimuthal quantum number ($l$) = 0 (for s-orbital).
Step 3: Calculation
Radial nodes = $2 - 0 - 1 = 1$. Angular nodes = 0.
Step 4: Conclusion
The 2s orbital has 1 radial node.
Final Answer:(B)
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