Question

Is tarnishing of copper a physical change our chemical change? Please explain tarnishing as well.​

Answer 1

Answer:

Explanation:

Tarnishing:- Tarnish is a thin layer of corrosion that forms over copper, brass etc. as their outermost layer undergoes a chemical reaction and this process is known as tarnishing.

Chemical change is characterized by the formation of new substances, and the making and breaking of chemical bonds. When a metal tarnishes, typically copper, brass, silver, aluminum, or magnesium, it reacts with atmospheric oxygen to form a thin oxide coating. When iron tarnishes, we call the phenomenon

rusting.

Answer 2

sublimation is considered or not considered a change of state of matter.