noble metal: Media
chemistry
Images
An assortment of noble metals, including the platinum-group metals—ruthenium, rhodium,...
Tomihahndorf
Identified by the chemical symbol Pt, platinum is one of the most unreactive metallic...
Chip Clark—Smithsonian Institution/U.S. Geological Survey
Alexander the Great, king of Macedonia, shown on a silver tetradrachm minted in Damascus,...
Yale University Art Gallery, The Ernest Collection in memory of Israel Myers (accession no. 2007.182.343)
Interactives
Modern version of the periodic table of the elements. To learn an element's name,...
Encyclopædia Britannica, Inc.
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