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A photon of wavelength 2.27 x 10^-8 m

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A photon of wavelength 2.27 x 10^-8 m has the minimum energy required to remove the single electron from an ion in its lowest energy state.
(a) Identify the ion
(b) What is the wavelength of the longest wavelength radiation absorbed by this ion in its lowest energy state? What region of the electromagnetic spectrum is this?

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This solution provides a detailed explanation, helping the student determine ions, wavelength of the longest wavelength, and what region of the electromagnetic spectrum is displayed. Two documents are attached, with full text explanation as well as equations.

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