Metal not effected by Corrosion

The process of corrosion doesn’t take place in which of the following metals, when these metals are left free in the air?

Answer: Gold

Corrosion is a process of deterioration of a metal as a result of its reaction with air or water (environment) surrounding it. Almost all metals except the least active metals such as Gold, Platinum, and Palladium are attacked by the environment i.e., undergo corrosion. For example, iron rusts, silver tarnishes, copper develops a green coating, lead or stainless steel lose their luster due to corrosion.

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