Noble metal,

Definition of Noble metal:

1. A metal (e.g. gold, silver, or platinum) that resists chemical action, does not corrode, and is not easily attacked by acids.

2. Metal characterized by a lack of chemical activity with atmosphere and mild acids, such as gold, silver, and platinum. Since noble metals are non-reactive, they do not develop rust (corrosion) and therefore have indefinite life span.

How to use Noble metal in a sentence?

1. In recent technology, thiols are used to create self-assembled monolayers on gold and other noble metals, which are protected from oxidation and other chemical effects.