Here's why:

* Alkali metals are found in Group 1 of the periodic table (Li, Na, K, Rb, Cs, Fr). They have one valence electron and are highly reactive.

* Transition metals are found in groups 3-12 of the periodic table. They have partially filled d orbitals, which gives them unique properties like variable oxidation states and the ability to form colored compounds.

Copper, with its atomic number 29, falls into group 11 of the periodic table, making it a transition metal.