Atomic Structure Question 496

Question: The following transition occurs when Lithium atoms are sprayed into hot flame. The various steps are numbered for identification.

$ 2s\xrightarrow{I}2p\xrightarrow{II}3d\xrightarrow{III}3p\xrightarrow{IV} $

$ 4s\xrightarrow{V}3p $ Which of these transitions result in emission of light-

Options:

A) I, II & V

B) III & V

C) III, IV & V

D) All

Show Answer

Answer:

Correct Answer: B

Solution:

  • $ 2s\xrightarrow{I}2p\xrightarrow{II}3d\xrightarrow{III}3p\xrightarrow{IV}4s\xrightarrow{V}3p $ Energy of 3d is more than 3p therefore it will emit energy, similarly from $ 4s\to 3p $ transition.


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