Question

why do copper vessels turn green with the passage of 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:

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 isexposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina.