The first transition series element having the most oxidation states
- Manganese, i.e. Mn (Z = 25), has an electronic configuration [Ar]3d54s2.
- In the d-subshell, it has the most unpaired electrons.
- A total of 5 + 2 = 7 electrons are available for bond creation because both the d and s orbitals are employed to create bonds.
- Therefore, among the first series of transition metals, Mn has the greatest oxidation state of +7.
Element that only exhibits the +3 oxidation state
- In these series, scandium (Sc) has a +3 oxidation state.
- The electronic configuration of Scandium (Sc) is [Ar]3d¹4s².
- There are a total of 1 + 2 = 3 electrons available for bond creation because the d and s orbitals are both employed to create bonds.
- As a result, (Sc) displays a +3 oxidation state.
- Because their valence electrons are in two separate sets of orbitals, namely in (n - 1)d and ns orbitals, the transition elements exhibit various oxidation states.
- When compared to the other elements in the first series of transition metals, which range from Sc (Z = 21) to Zn (Z = 30), manganese exhibits the most oxidation states.
- Scandium is an element that only exhibits +3 oxidation.
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