JEE Main202430 Jan 2024Evening ShiftChemistryStructure of AtomActual

Number of spectral lines obtained in He + spectra, when an electron makes transition from fifth excited state to first excited state will be

Correct answer

Step-by-step solution

The formula used here is: Number of spectral lines = ∑ n 2 - n 1 n 2 = Highest energy level=6(fifth excited state) n 1 =Lowest energy level=2(first excited state) Number of spectral lines = ∑ 6 - 2 = 10 Number of spectral lines in He + for transition from n = 6 to n = 2 are 10

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