The shining surface of metals may become dull due to formation of
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When some metals get exposed to air there is an oxidation process occurring on the outer layer of the metal. Due to the oxidation; a new layer covers the existing metal; hiding its original view; giving it a dull appearance. Almost all metals combine with oxygen to form metal oxides.
Metal + Oxygen → Metal oxide
Metal + Oxygen → Metal oxide
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its due to corrosion....
when some metals are exposed to air, ..due to moisture and oxygen metals corrode ....
when some metals are exposed to air, ..due to moisture and oxygen metals corrode ....
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