ombiedl ombiedl

24-02-2018
Chemistry

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

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IntelligenceCallsMe IntelligenceCallsMe

24-02-2018

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.

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louisleonardoro louisleonardoro

24-02-2018

The metals lose their shine because they oxidize but gold does not oxidize so it does not lose shine.

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