The dand fblock elements - Result Question 74
####74. Gadolinium belongs to $4 f$ series. It’s atomic number is 64 . Which of the following is the correct electronic configuration of gadolinium?
[1997, NEET Kar. 2013, 2015 RS]
(a) $[Xe] 4 f^{8} 6 d^{2}$
(b) $[Xe] 4 f^{9} 5 s^{1}$
(c) $[Xe] 4 f^{7} 5 d^{1} 6 s^{2}$
(d) $[Xe] 4 f^{6} 5 d^{2} 6 s^{2}$
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Solution:
- (c) $Gd(64)=[Xe] 4 f^{7} 5 d^{1} 6 s^{2}$
