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  2. Purple of Cassius - Wikipedia

    en.wikipedia.org/wiki/Purple_of_Cassius

    Purple of Cassius is a purple pigment formed by the reaction of gold salts with tin(II) chloride. It has been used to impart glass with a red coloration (see cranberry glass ), as well as to determine the presence of gold as a chemical test .

  3. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3 ; it is usually shown at the foot of the table to save horizontal space.

  4. GOLD - Wikipedia

    en.wikipedia.org/wiki/GOLD

    Gold, a chemical element; Genomes OnLine Database; Global-scale Observations of the Limb and Disk, a NASA Explorer Mission of Opportunity; GOLD (parser), an open-source parser-generator of BNF-based grammars; Graduates of the Last Decade, an Institute of Electrical and Electronics Engineers program to garner more university level student members

  5. The history and meaning behind traditional Christmas colors

    www.aol.com/news/history-meaning-behind...

    Purple has long been considered to be a regal and royal color because, as Sawaya explains, prior to 1856, purple dyes and pigments were rare and only the wealthiest could afford it.

  6. The story breathes life into the earth elements of fire, water, land […] The opening shows a family arriving at the fictional port of Elemental City, which closely reflected the immigration ...

  7. Precious metal - Wikipedia

    en.wikipedia.org/wiki/Precious_metal

    Gold nugget A selection of precious metal elements; gold, silver, platinum, palladium, copper, ruthenium, rhodium, rhenium, osmium, iridium and mercury. They are labeled and arranged by their location on the periodic table. Precious metals are rare, naturally occurring metallic chemical elements of high economic value.

  8. ‘Mysterious’ purple lump found at ancient Roman ruins was ...

    www.aol.com/news/mysterious-purple-lump-found...

    As a result, the pigment was “expensive and was worth more than gold pound for pound.” The lump of Tyrian purple dye found at the Carlisle Cricket Club is “roughly the size of a ping pong ...

  9. History of the periodic table - Wikipedia

    en.wikipedia.org/wiki/History_of_the_periodic_table

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and extended ...