Question

Why are the elements in the second and third transition series generally more stable in higher oxidation states than the elements of the first transition series?

Select the correct answer below:

Elements in the second and third transition series generally have a high reduction potential and thus resist oxidation.

The atomic radii of elements in the second and third transition series are generally larger than those in the first transition series.

Metal ions of the first transition series are unstable in water and form oxyanions.

The elements in the second and third transition series have f-electrons, which has a stabilizing effect.

Answer 1

QUESTION:

The elements in the second and third transition series generally more stable in higher oxidation states than the elements of the first transition series

The atomic radii of elements in the second and third transition series are generally larger than those in the first transition series.

EXPLANATION / REASON:

The elements of second (4d) and third (5d) transition series are larger than those in the first (3d) transition series. Hence elements of second and third transition series loose more electrons easily and exhibit stability in higher oxidation states.