Chemistry-
General
Easy
Question
Which of the following pair is not isoelectronic:
- Mn+2,Fe+3
- Fe+2,Co+3
- Fe+2,Cr+3
- Cr+1,Mn+2
The correct answer is: Fe+2,Cr+3
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The configuration 1s2,2s2,2p5,3s1 shows:
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