Question

Which of the following electronic transitions could lead to the emission of light from an atom? Select all that apply

A) 1s-->4p

B) 4p-->3d

C) 3d-->5f

D) 5f-->4d

E) 4d-->2p

Answer 1

When the electron from the higher energy level ( higher pricipal quantum number ) falls to lower energy level ( lower principal quantum number ) then the released energy from the electron emits as light . This phenomenon is known as emmision spectrum .

Thus among the given electronic transitions , the electronic transitions that could lead to emmision of the light from an atom are —

4p —> 3d

5f —> 4d

4d —> 2p .

So , the correct options are B , D and E .