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Why do some metals lose their shine over time but not gold ?
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Why do some metals lose their shine over time but not gold ?

User Sunday Ikpe
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The metals lose their shine because they oxidize but gold does not oxidize so it does not lose shine.
User Gerardnico
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Corrosion. Metals tend to form oxide and over time, they rust. ( 2 FeO(OH) ⇌ Fe2O3 + H2O). Gold and platinum on the other hand are noble metals and remain stable in their pure form. Thus, no electron loss and no oxidation.
User Zuber
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