Oxygen. The product is copper oxide.
When the product is with oxygen it will be copper oxide CuO. If it is with nitrogen it is copper nitrate.
Heating copper in air the copper oxide CuO is formed.
When copper reacts with oxygen, a chemical change occurs and copper oxide is formed. Copper atoms from the copper surface react with oxygen molecules in the air to produce copper oxide. The appearance of the copper may change, as it can develop a greenish-blue color due to the formation of copper oxide.
strong alkaline
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An oxide is formed.
When the product is with oxygen it will be copper oxide CuO. If it is with nitrogen it is copper nitrate.
Cooper get oxidised to copper oxide when burned in air.
Heating copper in air the copper oxide CuO is formed.
Aluminum, copper, and iron.
it does react, creating a blue-green coating e.g. the statue of liberty
Nitrogen Oxide
Oxygen can not burn in air.
The black coating you see is a coating of copper oxide, which forms when the hot metal reacts with air. no air can reach the inside, so it does not react to form black copper oxide.
Metallic oxides
Air can cause copper to undergo oxidation, resulting in the formation of a layer of copper oxide on the surface of the metal. Over time, this oxide layer can continue to react with oxygen and moisture in the air, leading to the gradual corrosion and tarnishing of the copper surface.
Copper does react with air. It oxidizes turning a bluey-green colour, i.e the statue of liberty.