Atomic Energy Levels and Zeeman Effect

The present theory of complex spectra, neglecting magnetic interactions between electrons, has been successful enough in interpreting the data for certain simple configurations that it is of interest to discuss the extent to which this procedure can be applied to the energy levels and Zeeman effect of other configurations. The theory is extended to include $p^{5}p$ and comparison is made with experimental data. Greater discrepancies appear here than in simpler cases. This is an example of the greater importance of the neglected interactions in more complex configurations.