A hydrogen atom is excited to the level and then emits photons belonging to the…

CHEMISTRY · Single correct · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

A hydrogen atom is excited to the n=5n=5 level and then emits photons belonging to the Balmer series. Choose the correct pair giving (i) the number of Balmer lines and (ii) the wavelength of the shortest among them. (Take RH=1.097×107 m−1R_H = 1.097\times10^7\,\text{m}^{-1}.) (a) 4 lines, λ≈434 nm\lambda \approx 434\,\text{nm} (b) 3 lines, λ≈486 nm\lambda \approx 486\,\text{nm} (c) 3 lines, λ≈434 nm\lambda \approx 434\,\text{nm} (d) 3 lines, λ≈410 nm\lambda \approx 410\,\text{nm}

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