Why is copper considered to be a transition element ?

Why is Cu considered to be a transition element and Zn not ?

Why is Copper considered as transition metal ?

Why is copper-29 considered a transition metal?

Why Ag is considered to be a transitional element though it has d^10 ground state electronic configuration?

Why is copper considered a transition metal, although it has completely filled d-orbital (3d^10) ?

Why is 'Zn' not considered as transition element ?

Why is copper (At no. 29) considered a transition metal?

Why is the copper (Z-29) considered as a transition metal ?