Why is gold called noble metal?

1.	Why is gold called noble metal?
Answer» The noble metals are a group of metals that resist oxidation and corrosion in moist air. The noble metals are not easily attacked by acids. They are the opposite of the base metals, which more readily oxidize and corrode. Gold has all the above properties and it dissolve in the acid solution aqua regia.So it is called as noble metal.

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