The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63) 7 1 7 2 2 2 2 7 4 9 2 2 3+ 1 2 7 2+ 7 (A) [Xe]4f ,[Xe]4f (B) [Xe]4f 6s ,[Xe]4f

Question

The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63) 7 1 7 2 2 2 2 7 4 9 2 2 3+ 1 2 7 2+ 7

(A) [Xe]4f ,[Xe]4f
(B) [Xe]4f 6s ,[Xe]4f 6s
(C) [Xe]4f ,[Xe]4f
(D) [Xe]4f ,[Xe]4f

Prashant Kotian · Accepted Answer

Correct answer: B) [XE]4F 6S ,[XE]4F 6S. Ce (58): [Xe] 6s 4f (g.s) Ce :[Xe]4f Eu(63)∶[Xe]6s 4f (g.s) Eu ∶[Xe]4f

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