Question:
The spectral series formed when electrons of excited hydrogen atoms return to the third orbit from higher energy orbits is:
The spectral series formed when electrons of excited hydrogen atoms return to the third orbit from higher energy orbits is:
Show Hint
Remember the order of hydrogen spectral series:
\[
1 \rightarrow \text{Lyman}
\]
\[
2 \rightarrow \text{Balmer}
\]
\[
3 \rightarrow \text{Paschen}
\]
\[
4 \rightarrow \text{Brackett}
\]
\[
5 \rightarrow \text{Pfund}
\]
Updated On: Jun 26, 2026
- Lyman series
- Paschen series
- Brackett series
- Pfund series
Show Solution
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The Correct Option is B
Solution and Explanation
Step 1: Understand hydrogen spectral series.
In the hydrogen atom, spectral series are formed when electrons jump from higher energy levels to a fixed lower energy level.
Different series correspond to different final orbits.
Step 2: Recall the important spectral series.
\[ \text{Lyman series} \rightarrow n_f=1 \] \[ \text{Balmer series} \rightarrow n_f=2 \] \[ \text{Paschen series} \rightarrow n_f=3 \] \[ \text{Brackett series} \rightarrow n_f=4 \] \[ \text{Pfund series} \rightarrow n_f=5 \]
Step 3: Identify the required series.
The question states that electrons return to the third orbit: \[ n_f=3 \] The spectral series corresponding to \[ n_f=3 \] is the Paschen series.
Step 4: Final conclusion.
Therefore, the required spectral series is \[ \boxed{\text{Paschen series}} \] Hence, the correct option is \[ \boxed{(2)} \]
In the hydrogen atom, spectral series are formed when electrons jump from higher energy levels to a fixed lower energy level.
Different series correspond to different final orbits.
Step 2: Recall the important spectral series.
\[ \text{Lyman series} \rightarrow n_f=1 \] \[ \text{Balmer series} \rightarrow n_f=2 \] \[ \text{Paschen series} \rightarrow n_f=3 \] \[ \text{Brackett series} \rightarrow n_f=4 \] \[ \text{Pfund series} \rightarrow n_f=5 \]
Step 3: Identify the required series.
The question states that electrons return to the third orbit: \[ n_f=3 \] The spectral series corresponding to \[ n_f=3 \] is the Paschen series.
Step 4: Final conclusion.
Therefore, the required spectral series is \[ \boxed{\text{Paschen series}} \] Hence, the correct option is \[ \boxed{(2)} \]
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