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Sir/mam , Which elements have exceptional electronic configuration & what is called exceptional e.c meant for?  
Asked by Saranyavulli70 | 28 Mar, 2019, 15:41: PM
answered-by-expert Expert Answer
A l t h o u g h space t h e space A u f b a u space r u l e space a c c u r a t e l y space p r e d i c t s space t h e space e l e c t r o n space c o n f i g u r a t i o n space o f space m o s t space e l e m e n t s comma T h e r e space a r e space n o t a b l e space e x c e p t i o n s space a m o n g space t h e space t r a n s i t i o n space m e t a l s space a n d space h e a v i e r space e l e m e n t s. T h e space r e a s o n space t h e s e space e x c e p t i o n s space o c c u r space i s space t h a t space s o m e space e l e m e n t s space a r e space m o r e space s t a b l e space w i t h space f e w e r space e l e c t r o n s space i n space s o m e space s u b s h e l l s space a n d space m o r e space e l e c t r o n s space i n space o t h e r s. E g. space F o r space C h r o m i u m space M e t a l space left parenthesis C r right parenthesis space w i t h space Z space equals space 24 space e l e c t r o n i c space c o n f i g u r a t i o n space s h o u l d space b e space 4 s squared space 3 d to the power of 4 B u t space a c t u a l l y space i t space i s space 4 s to the power of 1 space 3 d to the power of 5 space t h i s space i s space d u e space t o space t h e space e x t r a space s t a b i l i t y space a c q u i r e d space b y space h a l f l y space f i l l i n g space o f space t h e space o r b i t a l s. S a m e space i s space t h e space c a s e space w i t h space c o p p e r space left parenthesis C u right parenthesis comma space Z space equals space 29
Answered by Sumit Chakrapani | 28 Mar, 2019, 18:29: PM

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