Question

Give reason :

A shiny copper object turns green after some time. ​

Answer 1

Answer:

Copper turns green because of chemical reactions with the elements. ... Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina.

Answer 2

Answer:

due to the croding of copper

Explanation:

copper is reactive metal,then it react with air easily so cu change in green color