Answer:
when silver articles exposed to air silver racts with Sulphur present in the atmosphere and form a black layer of silver sulphide on the surface. copper articles get tarnished by reacting with air and water. due to this, a layer is formed over copper vessels.
The answer to the question is a.
Answer:
-aluminum
Explanation:
Last one is the correct answer
Answer:
i think its an animal cell
Explanation:
i may be wrong