[MP PET 1994]
A) $ M{{n}^{2+}} $
B) $ F{{e}^{2+}} $
C) $ Co $
D) $ Ge $
Correct Answer: B
$ F{{e}^{2+}}-1s^{2}2s^{2}p^{6}3s^{2}p^{6}d^{6} $ .
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