Ag atom has completely filled d orbitals in its ground state then How Ag can be a transition element?
The characteristic chemical properties of transition metals are formation of variable oxidation states, strong tendency to form complexes and coloured compound.Ag although have filled d-orbital in ground state but it shows variable oxidation states in its compound. It shows +1 and +2 oxidation state, but the stable one is +2 oxidation state. That is why it is considered as transition metal.
Ag : [Kr] 4d10 5s1
Ag2+ : [Kr] 4d9