a student has been collecting silver and gold coins. one day she observed a black coating on silver coins and a green coating on copper coins.which chemical phenomenon is responsible for these coatings?write the chemical name of black and green coatings.
Answers
Answered by
1
It is a chemical reaction. First sliver is junked
Similar questions
Environmental Sciences,
7 months ago
English,
7 months ago
Physics,
7 months ago
English,
1 year ago
Social Sciences,
1 year ago
Hindi,
1 year ago
Biology,
1 year ago