To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate youranswer with examples.

To what extent do the electronic configurations decide the stability o

1.	To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate youranswer with examples.
Answer» The elements in the first-half of the transition series exhibit many oxidation states with Mn exhibiting maximum number of oxidation states (+2 to +7). The stability of +2 oxidation state increases with the increase in atomic number. This happens as more electrons are getting filled in the d-orbital. However, Sc does not show +2 oxidation state. Its electronic configuration is 4s² 3d¹. It loses all the three electrons to form Sc3+. ⁺³oxidation state of Sc is very stable as by losing all three electrons, it attains stable noble gas configuration, [Ar]. Ti (+ 4) and V(+5) are very stable for the same reason. For Mn, +2 oxidation state is very stable as after losing two electrons, its d-orbital is exactly half-filled, [Ar] 3d^5.

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To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate youranswer with examples.

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