Question

In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon having λ = 500 nm provides just enough energy to promote an electron from the second quantum level to the third. From this information, we can deduce Select one:
a. the energy of the n = 2 level
b. the energy of the n = 3 level
c. the sum of the energies of n = 2 and n = 3
d. the difference in energies between n = 2 and n = 3
e. all of these

Answer 1

Answer:

d

Explanation:

The energy of the photon corresponds to the energy gap between the second and third energies levels, the energy required to remove from the second level to the third level. Thus, the energy of the photon corresponds to a difference in energies between two levels, not to the absolute energy of a given level.