The outer electron configuration of Gd (Atomic no. 64) is:

(a) 4f3 5d56d2

(b) 4f8 5d106d2

(c) 4f4 5d46d2

(d) 4f7 5d16s2

Concept Videos :-

#22 | Atomic Radius

Concept Questions :-

(d) Gadolinium (64Gd) has [Xe]54 4f7 5d16s2 configuration.

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