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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2016
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Q)

The electronic configurations of Eu (Atomic No. 63), Gd(Atomic No. 64) and Tb (Atomic No. 65) are:


( A ) [Xe]4f76s2,[Xe]4f75d16s2and[Xe]4f96s2
( B ) [Xe]4f65d16s2,[Xe]4f75d16s2and[Xe]4f96s2
( C ) [Xe]4f65d16s2,[Xe]4f75d16s2and[Xe]4f85d16s2
( D ) [Xe]4f76s2,[Xe]4f86s2and[Xe]4f85d16s2
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