<\body> Qualitative understanding of many-electron atoms 1. centr. field (r)> ``close`` to \ nucleus\ <\equation*> V(r)=-|r> the ratio <\equation*> R(r) = (r)>>|V(r)> = (r)>>|-|r>> is such that \ close to nucleus, 0)\(1-) \ \ 1> \ while \ for large r \)\> \; \; <\equation*> (1s) (2s) (2p) \ Ne (2s) (2p) \ Ne> (2s) (2p) (3s) (3p)(3d)\ Ni> \ \ But this does not work <\references> <\collection> > <\auxiliary> <\collection> <\associate|figure> >