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Grade: 12
        Atomic structure:Q) Sum of the paired electrons present in the orbital with l=2 in all the species of Fe2+, Co2+, Ni2+ are-(Options given in the attachment)Please do explain how the answer was obtained. Thanks.
10 months ago

Answers : (1)

Arun
14827 Points
							

 l = 2 means d orbitals  

electronic configuration of Fe2+ = [Ar] 3d6  

six electrons in d orbitals 4 will be unpaired 2 will be paired  

electronic configuration of Co2+ = [Ar] 3d7  

three electrons will be unpaired four will be paierd  

electronic configuration of Ni2+ = [Ar] 3d8  
two electrons will be unpaired and six will be paired

So the sum of paired electrons is 2+4+6=12

10 months ago
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