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Q-If each hydrogen atom is excited by giving 8.4 eV of energy then the number of spectral lines emitted is equal to: (A) None (B) Two (C) Three (D) Four

Q-If each hydrogen atom is excited by giving 8.4 eV of energy then the number of   spectral lines emitted is equal to:
       (A) None (B) Two (C) Three (D) Four

Grade:Upto college level

3 Answers

Srinivas Rao
11 Points
11 years ago

Isolated hydrogen atom can absorb any of the following quanta of energy, given by the equation

Energy absorbed =13.6 ( 1 - ( 1 / n2 ) e.v. ; where n can take whole number values  from 1 to infinity.

For any value of 'n' it cannot be 8.4 e.v.

So, hydrogen atom out rightly rejects that quantum. No electronic excitation takes place- no emission of radiation and it will not result in any spectral line. So, answer is 'none'

deeksha sharma
40 Points
11 years ago

a) none

as min of 10.2 eV of energy is required to make the electron get excited.

bhavani tejaswi
20 Points
6 years ago
0

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