Chemistry · d-Block Elements
Consider the following ions: (I) Ni2+ (II) Co2+ (III) Cr2+ (IV) Fe3+ (Atomic numbers: Cr = 24, Fe = 26, Co = 27, Ni = 28) Identify the correct sequence of the increasing order of the number of unpaired electrons in them.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1III < I < IV < II
- 2I < III < II < IV
- 3IV < II < III < I
- 4I < II < III < IV✓
Correct answer
I < II < III < IV
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