Question

why do metal's object loose their luster after a while​

Answer 1

Answer:

over a period of time metals loose their lusture because of the oxygen present in the air reacts with the metal hence, the metals form a brownish layer called rust

hope it helps

Answer 2

Answer:- Because of the moisture in atmosphere.

Explanation:- When any metallic object comes in contact with moist air, it looses it shine. If you find my answer helpful plz mark my answer as branliest.

Thank you!