Final answer:
The photoelectron spectra suggest a need to refine the shell model of the atom is a. Yes
Step-by-step explanation:
The photoelectron spectra do suggest a need to refine the shell model of the atom. Bohr's model of the atom, which is part of the shell model, accurately predicts the emission spectrum for hydrogen. However, it fails to correctly predict the emission spectrum for larger atoms like helium. This indicates that the shell model needs to be refined to account for the behavior of electrons in atoms with multiple electrons.
One of the limitations of Bohr's model is that it assumes electrons orbit at fixed distances defined by a single quantum number and never in between. However, experimental data shows that electron behavior is more complex. The shell model needs to be refined to better explain the behavior of electrons in atoms with multiple electrons and accurately predict their emission spectra. Therefore the correct answer is a. Yes