Respuesta :
Answer:
When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish. This process is called tarnishing, as explained below in The science of silver tarnish and its cause.
Explanation:
Silver metal that is exposed to the air tarnishes and becomes black over time this is most likely the result of hydrogen sulphide and oxygen present in the air.
What is the meaning of tarnish?
It often appears as a dull, grey or black film or coating over metal. Tarnish is a surface phenomenon that is self-limiting, unlike rust.
When silver metal or ornaments made of silver get exposed to air, they get decolourised or we can say tarnished.
It is because in the atmosphere, a silver metal reacts with the hydrogen sulphide and oxygen present in the air and it leads to the formation of compounds which leads to the tarnishing of silver ornaments.
Learn more about the tarnish here:
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