The outer electronic configuration of Gd (At. No. 64) is : (a) \( 4 f^{4} 5 d^{5} 6 s^{1} \) (b)...

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The outer electronic configuration of Gd (At. No. 64) is :
(a) \( 4 f^{4} 5 d^{5} 6 s^{1} \)
(b) \( 4 f^{5} 5 d^{4} 6 s^{1} \)
(NEET Kar. 2013)
(c) \( 4 f^{7} 5 d^{1} 6 s^{2} \)
(d) \( 4 f^{3} 5 d^{5} 6 s^{2} \)
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