Data tables ground-state electron configurations

The most conventional ground-state electronic configuration based on emission spectral data along with the terms are given in Table 2.3. 

Now consider the ground state electronic configurations of isolated atoms of all the elements (Table 1.3). These are experimental data, and are nearly always obtained by analysing atomic spectra. Most atomic spectra are too complex for discussion here and we take their interpretation on trust. 

FIGURE 1 Promotion energies of the Ln ions from the ground states to configurations with two non-4f electrons, [Xe]4f" 5d 6s (red diamonds) (dark gray in print) and [Xe]4f" 5d (blue squares) (light gray in print) data are from Table 1. 

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