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Which energy transition may take place in the atom if its electron has absorbed a photon? A-n = 5 to n = 1 B-n = 3 to n = 2 C-n = 5 to n = 2 D-n = 1 to n = 3 E-n = 3 to n = 1

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Ishankahps
Answer is "D".

When an electron absorbs a photon, the energy of the electron will be high. Then that electron cannot remain on the same energy level. Hence, that electron will go to a higher energy level from the ground state. Hence, the energy transition should be from lower energy level to higher energy level. 

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