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.