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Question

The outer electronic configuration of Gd (Atomic No:64) is:
  1. 4f45d46s2
  2. 4f75d16s2
  3. 4f35d56s2
  4. 4f85d06s2


Solution

The correct option is B 4f75d16s2
Gadolinium (Gd) is a ductile rare earth element having atomic number 64.
64Gd:54[Xe]4f75d16s2

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