Q

Which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?

8.23 Which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?

In the first transition series, Cu (copper) exhibits +1 oxidation states most frequently. This is because$Cu^{+}$ has stable electronic configuration of  $[Ar]3d^{10}$. the fully filled d-orbital makes it highly stable.