MCQ
The pair of ions having same electronic configuration is ______.
- ACr3+, Fe3+
- BFe3+, Mn2+ +
- CFe3+, CO3+
- DSc3+, Cr3+
✓
Answer
- Fe3+, Mn2+ +
Explanation:
26Fe = [Ae] 3d6, 4s2 26Fe3+ = [Ar] 3d5
25Mn = [Ar] 3d5, 4s2 25Mn2+ = [Ar] 3d5
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