Activity. 11. Energy Level Transitions. The following labelled transitions represent an electron moving between energy levels in hydrogen. ionization free electrons 13.6 eV level 4 level 3 12.8 eV 12.1 eV level 2 E 102 eV А B с D level 1 00 eV Answer each of the following questions and explain your answers. a. Which transition could represent an atom that absorbs a photon with 10.2 eV of energy? b. Which transition could represent an atom that emits a photon with 10.2 eV of energy? C. Which transition represents an electron that is breaking free of the atom? d. Which transition, as shown, is not possible? e. Would transition A represent emission or absorption of light? How would the wavelength of the emitted absorbed photon of transition A compare to that of the photon involved in transition C? f. or

a)Transition B. Absorption of a photon is indicated by the upward pointing arrow. The photon transitions from level 1 to level 2.
b)Transition C. In opposition to Part A, a downward pointing arrow shows that a photon is being emitted. This photon is going from level 2 to level 1.
c)Transition E. This photon has gained enough energy to escape the atom.
d)Transition D is not possible. Going from level to level requires "exact change". Because this photon did not gain either 10.2 eV, 12.1 eV, 12.8 eV, or 13.6 eV, it cannot exceed to any level. Therefore, it falls back down to level 1.

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