Question

Iron can form two types of inos. Compare the ionic
sizes of the respective ions.

Answer 1

Both `Fe^(2+) and Fe^(3+) have the same nume of protons
but the number of electron in `Fe^(3+)` is less than ltBrgt that of `Fe^(2+)` . Hence the effective nuclear charge is
more in the case of `Fe^(3+)` and thereby the ionic size
of `Fe^(3+) ` is less than that of `Fe^(2+)` .