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Q.
Number of unpaired electron present in Gadolinium is________
NTA AbhyasNTA Abhyas 2022
Solution:
Gadolinium is the element present in lanthanide series which has atomic number $64$ .
Electronic configuration of Gadolinium is
$_{64}Gd: \left[Xe\right] 4 f^{7} 5 d^{1} 6 s^{2} $
All electrons in $5d\&4f$ are unpaired.
So, number of unpaired electrons is $8$ .