S(Hir. ("().v/7-.u/'(»A'. /A')' .ii>r.i.\cis i\ finsus n i67 



Ik ilic svf>in(l.ir>- r.uli.itions of sil\i.T and liii, wliicli wc loiuul to 

 pnxlniv liiu's of ilu-ir own in \\\v I'lwtronic spectra of llu-so domonts. 

 Tlu-si- rcl.uions Itctwi-cii al)sor|)ti<>n-i'(l_nt's and einission-liiu-s make 



3.^^ 



5.2 



Fig. 8 



it |)or>,sii>li- to iiM' ilu- X-ra\ riiiission-iincs of atoms to identify and 

 map out their levels. 



This discussion of electronic spectra and X-ray absorptions has 

 servefi to illustrate the remark made in the opening paragraph, that 

 our knowledge about the \arious arrangements of the electrons 



