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Which series of H(2) atom lie in infrare...

Which series of `H_(2)` atom lie in infrared region?

A

Lyman

B

Balmer

C

Brackett, Paschen and Pfund

D

All of these

Text Solution

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The correct Answer is:
To determine which series of the hydrogen atom lies in the infrared region, we can analyze the different series of spectral lines associated with hydrogen. Here’s a step-by-step solution: ### Step 1: Understand the Series of Hydrogen Atom The spectral lines of hydrogen are categorized into different series based on the principal quantum number (n) of the electron transitions. The main series are: - Lyman series (n=1) - Balmer series (n=2) - Paschen series (n=3) - Brackett series (n=4) - Pfund series (n=5) ### Step 2: Identify the Regions of Electromagnetic Spectrum Each series corresponds to a specific region of the electromagnetic spectrum: - **Lyman series**: Transitions to n=1 (ultraviolet region) - **Balmer series**: Transitions to n=2 (visible region) - **Paschen series**: Transitions to n=3 (infrared region) - **Brackett series**: Transitions to n=4 (infrared region) - **Pfund series**: Transitions to n=5 (infrared region) ### Step 3: Determine Which Series Lies in the Infrared Region From the information gathered: - The **Paschen**, **Brackett**, and **Pfund** series all lie in the infrared region. ### Conclusion Thus, the series of the hydrogen atom that lie in the infrared region are: - **Paschen series** - **Brackett series** - **Pfund series** ### Final Answer The correct answer is option 3: **Bracket, Paschen, and Pfund series**. ---
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