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+1 vote
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in Chemistry by (64.7k points)

Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.

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The wave number of the radiation emitted from a hydrogen atom is given by

For Balmer series, n1 = 2. The wavelength (λ) will be maximum when the electrons drop from energy level n2 = 3 to n1 = 2

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