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Russell-Saunders Coupling Scheme

! The ways in which individual ml and ms values interact are not easily evaluated for a real atom or ion.
! In fact, the notion that we can assign individual ml and ms values to the electrons and assess their interactions on that basis is really an extreme extension of the one-electron wave mechanical model.
! The Russell Saunders coupling scheme is a reasonably good first approximation for assessing the origins of the term energies in many cases in terms of summations of individual electron ml and ms values.
! The Russell-Saunders coupling scheme can be applied successfully to interpreting the term energies of first and second row transition metals " Less successful with the third row transition elements
" Hopelessly inadequate with f-block transition elements ,.
author

DESH DEEPAK A P S CHAUHAN

M.Sc. CHEMISTRY!

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