Question

Electrons returning to the ground state from varying excited states always:


produce the same energy, because they are returning to the same ground state

produce characteristic sets of energies, depending on the differences in energy between the excited states and ground state

vary in energy, even when the energy difference between excited to ground state stays the same

produce equal sized emission bands

Answer 1

produce characteristic sets of energies, depending on the differences in energy between the excited states and ground state
that phenomenon is used often for characterization of elements