Question

Why is radius of Fe2+ larger than Fe3+?

Answer 1

Yes because Fe3+ has one less electron the nuclear charge acting on electrons is larger and electronic repulsion is lesser. This causes the outer shell of Fe3+ to be pulled a little more inwards compared to Fe2+.

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Answer 2

Answer:

since there are more electrons in fe2+ than in fe3+ so more repulsion between shells so that's why radius is larger of fe2+