The electron localization function (ELF) was calculated for the atoms
Li to Sr. The ELF maxima reveal the atomic shell structure for all the
se atoms. The shells are separated from each other by ELF minima. The
integration of the electron density in a shell gives electron numbers.
For the valence shell those are in good agreement with the ones expec
ted from the Periodic Table of Elements. (C) 1996 John Wiley & Sons, I
nc.