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How does the filling of electrons in f block elements take place ? Pls explain how to write the electronic configuration if f block elements like Gd(64) ? Why its outer electronic configuration is 4f[7] 5d[1] 6s[2] not 4f[8] 5d[0] 6s[2] if (n+l) rule is followed? . Pls explain how to write the electronic configuration of f block as well as d block elements .

How does the filling of electrons in f block elements take place ? Pls explain how to write the electronic configuration if f block elements like Gd(64) ? Why its outer electronic configuration is 4f[7] 5d[1] 6s[2] not 4f[8] 5d[0] 6s[2] if (n+l) rule is followed? . Pls explain how to write the electronic configuration of f block as well as d block elements . 

Grade:12th Pass

2 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
7 years ago
as we lnoe half filled and fully filled orbital are more stable than normal configuration. so better remember these exception from a list of periodic table which i am giving
Cr,Cu,Nb,Mo,Ru,Rh,Pd,Ag,La,Pm,Gd,Pt,Au,Ac,Th,Pa,U,Cm,Bk,Lw

thanks and regards
sunil kr
askIItian faculty
SANIKA
39 Points
7 years ago
But pls tell how to write electronic-configuration of f and d block elements not taking in consideration the exceptions

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