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This alchemical symbol for platinum was made by joining the symbols of silver and gold . Antonio de Ulloa is credited in European history with the discovery of platinum. In 1735, Antonio de Ulloa and Jorge Juan y Santacilia saw Native Americans mining platinum while the Spaniards were travelling through Colombia and Peru for eight years. Ulloa ...
Platinum melts at 1768 °C (3215 °F), even higher than iron. [21] Native South Americans worked with it instead by sintering: they combined gold and platinum powders, until the alloy became soft enough to shape with tools. [25] [26]
In 1840, he enclosed a platinum coil in a vacuum tube and passed an electric current through it, [8] thus creating one of the world's first electric light bulbs. [ 9 ] [ 10 ] The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain ...
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 ...
An image from John Dalton's A New System of Chemical Philosophy, the first modern explanation of atomic theory.. This timeline of chemistry lists important works, discoveries, ideas, inventions, and experiments that significantly changed humanity's understanding of the modern science known as chemistry, defined as the scientific study of the composition of matter and of its interactions.
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The Cambridge World History. Volume 1: Introducing World History, to 10,000 BCE, edited by David Christian. The Cambridge World History is a seven volume history of the world in nine books published by Cambridge University Press in 2015. The editor in chief is Merry E. Wiesner-Hanks. The history takes a comparativist approach.
1450s – Cristallo, a clear soda-based glass, is invented by Angelo Barovier; 1540 – Vannoccio Biringuccio publishes first systematic book on metallurgy; 1556 – Georg Agricola's influential book on metallurgy; 1590 – Glass lenses are developed in the Netherlands and used for the first time in microscopes and telescopes