Question

-chemical reaction in which colour of substance changes​

Answer 1

• when copper react with the element oxygen water and carbon dioxide it turns from its element of reddish brown to Green

Answer 2

Answer:

When copper reacts with the elements (oxygen, water and carbon dioxide), it turns from its element color of reddish-brown to green. This chemical reaction is hydrated copper carbonate, and a famous example of it is the Statue of Liberty.