Question

What may be the stable oxidation state of the transition element with the following d-electron configurations in the ground state of their atoms : 3d3, 3d5, 3d8 and 3d4 ?​

Answer 1

Answer:

Up to Mn, the maximum stable oxidation state corresponds to sum of s and d electrons. After Mn, there is decrease in the stability of higher oxidation states. The stable oxidation states of the transition elements with the following d electron configurations in the ground state of their atoms are as shown.

3d

3

4s

2

:+5

3d

5

4s

1

:+1,+6

3d

5

4s

2

:+2,+7

3d

8

4s

2

:+2

3d

4

4s

2

:+1,+6