Question

Why is Fe 3+ ion more stable than Co 3+ ion

Answer 1

Answer:

Fe 3+ has configuration of 3 d5 which is half filled d configuration and gives extra stability..

while Co 3+ has configuration 3 d6 which is neither full filled nor half filled..

hence Fe 3+ is more stable than Co 3+

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Answer 2

Answer:

Fe3+ ion is more stable due to its half-filled 3d5 electron configuration. As half filled and completely filled shells are more stable Fe3+ ion is more stable.

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