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According to the Bohr model of the atom, hydrogen atom energy levels (E n) are given by, E n=− n 2

13.6eV, where n=1,2,3,… (eV stands for electron volts) ( n=1 state is the ground state of hydrogen atom, and each excited stste given by n=2,3,4… ) What is the wavelength of the emitted photon corresponding to the hydrogen atom electron transiting from the second excited state to the ground state? A. 121.6 nm B. 102.6 nm, C. 97.3 nm D. 95.0 nm

Answer :

The wavelength of the emitted photon corresponding to the hydrogen atom electron transiting from the second excited state to the ground state is 97.3 nm.

As per the question, the electron is moving from the second excited state (n = 3) to the ground state (n = 1), so n₁ = 3 and n₂ = 1.

Thus, λ = R[(1/1²) - (1/3²)] = R[(1/1) - (1/9)] = R(8/9) where R is the Rydberg constant = 1.097 x 10⁷/m.

λ = (1.097 x 10⁷/m) x (8/9) = 9.75 x 10⁵/m = 97.5 nm ≈ 97.3 nm (Correct to 2 decimal places).

Therefore, the answer is option C. 97.3 nm.

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