Atomic Structure Question 479

Question: The wave number of first line of Balmer series of hydrogen is $ 15200,c{m^{-1}} $ . The wave number of first Balmer line of $ L{i^{2+}} $ ion is

Options:

A) $ 15200,c{m^{-1}} $

B) $ 60800,c{m^{-1}} $

C) $ 76000,c{m^{-1}} $

D) $ 136800,c{m^{-1}} $

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Answer:

Correct Answer: D

Solution:

  • v for hydrogen like species $ =v_{H}\times Z^{2}=15200\times 3^{2}=15200\times 9=136800,c{m^{-1}} $


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