Aluminum is the one that isn't a transition metal. Aluminum is in group 3A.
Zirconium, chemical symbol is Zr, is a metal. Zicronium, however, is not.
Silver's classification is Transitional Metal.
Zirconium is a transition metal.
each is a metal
Al is a transitional metal since it is under the stair-step line that divides transitional metals from non-metals.
aluminum
aluminum
Transitional metal = Oorgangsmetale
Gold^^
Aluminum
Nothing. Mined from bauxite, aluminum is a silver/grey metal, an element in its own right.
The black tarnish on silver is silver sulfide, Ag2S. Presumably you are boiling silver in a metal pot. The salt water completes an electrochemical cell between the silver sulfide and the aluminum, copper, or iron pot. The oxidized silver in silver sulfide is reduced to silver metal, and part of the metal pot is oxidized; the reaction happens because silver wants to be reduced more than the other metals do. You might imagine that as the metal is oxidized it would become iron, copper, or aluminum sulfide, but the metal sulfides, especially aluminum sulfide, are not so stable. Aluminum sulfide hydrolyzes to aluminum hydroxides and hydrogen sulfide, H2S, the stinky gas, which is probably what you are calling "sulfur".