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Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. [9] Rubidium is the first alkali metal in the group to have a density higher than water.
Prepared and isolated from urine, it was the first element whose discovery date and discoverer are recorded. [53] Its name first appears in print in the work of Georg Kaspar Kirchmayer in 1676. Recognised as an element by Lavoisier. [1] 1 Hydrogen: 1671 R. Boyle: 1671 R. Boyle Robert Boyle produced it by reacting iron filings with dilute acid.
Robert Wilhelm Eberhard Bunsen (German:; 30 March 1811 [a] – 16 August 1899) was a German chemist.He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. [11]
1986: Karl Müller and Johannes Bednorz: Discovery of High-temperature superconductivity; 1988: Bart van Wees and colleagues at TU Delft and Philips Research discovered the quantized conductance in a two-dimensional electron gas. 1990: Mary-Claire King discovers the link between heritable breast cancers and a gene found on chromosome 17q21 ...
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.
1994 — The United States hosts the FIFA World Cup, which is won by Brazil. 1995 — Oklahoma City bombing kills 168 and wounds 800. The bombing is the worst domestic terrorist incident in U.S. history, and the investigation results in the arrests of Timothy McVeigh and Terry Nichols.
A timeline of United States inventions (after 1991) encompasses the ingenuity and innovative advancements of the United States within a historical context, dating from the Contemporary era to the present day, which have been achieved by inventors who are either native-born or naturalized citizens of the United States.
1912, Herbert Hoover (1874–1964; 31st President of the United States, 1929–1933) and his wife Lou Henry Hoover (1874–1944) translate George Agricola's De Re Metallica to English. Note: many mining expressions/words were Mediaeval German expressions, these expressions/words did not exist in Classical Latin.