Explanation Bohr’s model of hydrogen gives the explanation of the hydrogen spectrum in terms of electrons absorbing and emitting photos for the change of energy levels. Write the expression for the change in energy level. Δ E = h c λ (1) Here, Δ E is the change in energy. h is the Planck’s constant. c is the speed of light in vacuum. λ is the wavelength. Write the expression of Δ E . Δ E = E K − s h e l l − E L − s h e l l (2) Here, Δ E is the change in energy. Δ E K − s h e l l is the ionization energy of K-shell. Δ E L − s h e l l is the ionization energy of L-shell. Substitute, 8500 eV for the value of E K − s h e l l and 2125 eV for the value of E L − s h e l l in equation (2). Δ E = E K − s h e l l − E L − s h e l l = ( 8500 eV ) − ( 2125 eV ) = 6 375 eV ( 1

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Chapter 31, Problem 62PCE

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The wavelength of the Kα X-ray emitted by iron.

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The wavelength of the K α X-ray emitted by iron.

Solution Summary: The author explains the hydrogen spectrum in terms of electrons absorbing and emitting photos for the change of energy levels.

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The wavelength of the Kα X-ray emitted by iron.

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