The species with no electron in the 3d-orbital is
...The species with no electron in the 3d-orbital is
Zn2+
Sc3+
Cu
Mn
Correct answer is B
Scandium has electronic configuration 1s22s22p63s23p63d14s2 hence, Sc3+ has configuration 1s22s22p63s23p6. Hence, no electron in the 3d-orbital.
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