Question

The highest-energy electrons in Europium, Eu, are filling the __________. A. 6f orbitals B. 6d orbitals C....

The highest-energy electrons in Europium, Eu, are filling the __________.

A.

6f orbitals

B.

6d orbitals

C.

4f orbitals

D.

5f orbitals

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Answer #1

Option C

Since electronic configuration of Eu= [Xe]4f76s2

Highest energy orbital=4f, (n+l value= 4+3=7, l=3 for f orbital)

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