## Atomic Reference Data |

**Fig. 1**: The standard deviation,*σ*, of the total energies for the calculations among the various codes in each of the four approximations, as a function of atomic number*Z*.**Fig. 2**: Deviations of the results of 4 calculated LDA total energies from their average, vs. atomic number*Z*.**Fig. 3**: Deviations of the results of 3 calculated LSD total energies from their average, vs. atomic number*Z*.**Fig. 4**: Deviations of the results of 3 calculated RLDA total energies from their average, vs. atomic number*Z*.**Fig. 5**: Deviations of the results of 2 calculated ScRLDA total energies from their average, vs. atomic number*Z*.**Fig. 6**: Difference of LDA and LSD total energies of neutral atoms, vs. atomic number*Z*.**Fig. 7**: Difference of LDA and RLDA total energies of neutral atoms, vs. atomic number*Z*.**Fig. 8**: Difference of ScRLDA and RLDA total energies of neutral atoms, vs. atomic number*Z*.**Fig. 9**: Ionization potentials of the elements, as obtained from experiment (blue line, to be referred to scale on left)); and differences of calculated and experimental values for the LDA (black), LSD (green), and RLDA (red) approximations, all to be referenced to the right-hand energy scale.