The energy levels of the hydrogen atom are given by the expression En = -2.16×10-18 / n2 J where n is an integer. (a.) What is the ionization energy of the atom? (b.) What is the wavelength of the Hα line, which arises from transitions between n = 3 and n = 2 levels?

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Chapter6: The Periodic Table And Atomic Structure
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Problem 6.85PAE: 6.85 The visible lines in the hydrogen atom emission spectrum arise from transitions with a final...
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The energy levels of the hydrogen atom are given by the expression

En = -2.16×10-18 / n2 J

where n is an integer.
(a.) What is the ionization energy of the atom?
(b.) What is the wavelength of the Hα line, which arises from transitions between n = 3 and n = 2 levels? 

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