Problem: The orbital diagram that follows shows the valence electrons for a 2+ ion of an element. What is the electron configuration of an atom of this element?

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The orbital diagram that follows shows the valence electrons for a 2+ ion of an element. The 4d subshell contains five orbitals.  The first has two arrows, one pointing up and one pointing down.  The remaining orbitals all contain one arrow, each pointing up.

What is the electron configuration of an atom of this element?

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