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Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish platina, a diminutive of plata "silver". [7] [8] Platinum is a member of the platinum group of elements and group 10 of the periodic table of ...
The other metals discovered before the Scientific Revolution largely fit the pattern, except for high-melting platinum: Bismuth melts at 272 °C (521 °F) [ 21 ] Zinc melts at 420 °C (787 °F), [ 21 ] but importantly boils at 907 °C (1665 °F), a temperature below the melting point of silver.
A small box from the burial of the Pharaoh Shepenupet II (died around 650 BC) was found to be decorated with gold-platinum hieroglyphics, [36] but the Egyptians may not have recognised that there was platinum in their gold. [37] [38] First European description of a metal found in South American gold was in 1557 by Julius Caesar Scaliger.
A wrought iron ruler, the Toise of Peru, also called Toise de l'Académie, was the French primary standard of the toise, and the metre was officially defined by an artifact made of platinum kept in the National Archives. Besides the latter, another platinum and twelve iron standards of the metre were made by Étienne Lenoir in 1799.
Created by scientist Dr. William "Will" Magnus, the six robots were field leader Gold; strongman Iron; slow-witted and loyal Lead; hot-headed Mercury; self-doubting and insecure Tin; and Platinum (also called "Tina"), who believed that she was a real woman and was in love with her creator.
Platinum was first used for minting coins in Spanish-colonized America. Following the discovery of platinum in gold rocks, the Spaniards were unable to use it for a long time because they had no technology for processing this metal. The then-cheap platinum was used for various kinds of frauds, such as substituting it for the more expensive silver.
Many coins throughout history were made of gold, silver and copper. Silver: Gold: Iron: Numerous Chinese cash coins were made of iron, with the first being issued by the Han dynasty in 118 BCE. From 1942 through 1952, some of the Swedish krona coins – such as the 1, 2 and 5 öre – were made of iron. Lead: Most commonly seen in southeast ...
Platinum, 78 Pt; Platinum ... History; Discovery: ... As of 4 Jan 2023, conforms MOS:no new elements (no idle pages created; redirects for element names only)