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The (n+l) value for 4f sub-shell is...

The (n+l) value for 4f sub-shell is

A

4

B

5

C

6

D

7

Text Solution

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The correct Answer is:
To find the (n+l) value for the 4f sub-shell, we will follow these steps: ### Step-by-Step Solution: 1. **Identify the Principal Quantum Number (n)**: - For the 4f sub-shell, the principal quantum number (n) is 4. 2. **Determine the Azimuthal Quantum Number (l)**: - The azimuthal quantum number (l) corresponds to the type of sub-shell: - s sub-shell: l = 0 - p sub-shell: l = 1 - d sub-shell: l = 2 - f sub-shell: l = 3 - Since we are dealing with the f sub-shell, l = 3. 3. **Calculate (n + l)**: - Now, we can calculate the (n + l) value: \[ n + l = 4 + 3 = 7 \] 4. **Conclusion**: - Therefore, the (n + l) value for the 4f sub-shell is 7. ### Final Answer: The (n + l) value for the 4f sub-shell is **7**. ---
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