An electron in the c level of a mercury atom
returns to the ground state. which photon
energy could not be emitted by the atom during
this process?
(1) 0.22 ev (3) 4.86 ev
(2) 4.64 ev (4) 5.43 ev

5.43 eV

Explanation:

from the energy level diagram, we can calculate the energy difference between c level and the ground state. the difference is 4.86 eV which is less than the 5.43 eV of choice 4. therefore, a photon of that energy cannot be emitted

1 the 4 is sig

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