Final answer:
The Bohr electron energy model is limited to hydrogen-like one-electron atoms, where it provides a simple explanation for their emission spectra by assigning discrete energy levels to electron orbits.
Step-by-step explanation:
True, the Bohr electron energy model is indeed limited to one-electron atoms such as the hydrogen atom. Niels Bohr proposed that electrons are restricted to specific orbits, each with a fixed energy level, which means that electrons can only have certain allowable energies. This Bohr model accurately predicts the emission spectra of one-electron atoms by describing the discrete energy levels that correspond to certain orbits.
The model likens these orbits to the rungs of a ladder, suggesting an electron can only reside on specific rungs (energy levels), not in between. While the Bohr model was instrumental in advancing our understanding of atomic structure, it falls short when applied to multi-electron atoms, where the interactions between electrons significantly complicate the energy levels. Hence, Bohr's model primarily serves as an introduction to the topic and lays the groundwork for more complex models like the quantum mechanical model.