The electronic configuration of gadolinium (atomic no. 64), Chemistry

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The electronic configuration of gadolinium (atomic no. 64) is:

(1)  [Xe]4s8 5d9 6s2                         

(2) [Xe] 4s1 5d1 6s2           

(3) [Xe]4s3 5d5 6s2                        

(4) [Xe]4f6 5d2 6s2

Ans:  [Xe] 4s1 5d1 6s2

 


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