Gadolinium belongs to 4f series.

Question:

Gadolinium belongs to 4f series. Its atomic number is 64. Which of the

following is the correct electronic configuration of gadolinium?

(i) [Xe] 4f 75d16s2

(ii) [Xe] 4f 65d26s2

(iii) [Xe] 4f 86d2

(iv) [Xe] 4f 95s1

Solution:

Option (i) [Xe] 4f 75d16s2 is the answer.

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