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Martin Heinrich Klaproth (1 December 1743 – 1 January 1817), discovery of uranium (1789), zirconium (1789); establishment of tellurium, strontium, cerium and chromium. Jöns Jacob Berzelius (20 August 1779 – 7 August 1848), discovery of silicon (1824), selenium (1817), thorium (1858), and cerium (1803, with Klaproth).
The timeline begins at the Bronze Age, as it is difficult to give even estimates for the timing of events prior to this, such as of the discovery of counting, natural numbers and arithmetic. To avoid overlap with timeline of historic inventions , the timeline does not list examples of documentation for manufactured substances and devices unless ...
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.
American inventor Lee de Forest invented the triode: 1908: Scottish engineer Alan Archibald Campbell-Swinton, laid out the principles of Television. 1909: Mica capacitor was invented by William Dubilier: 1911: Dutch physicist Heike Kamerlingh Onnes discovered Superconductivity: 1912: American engineer Edwin Howard Armstrong developed the ...
Timeline of the history of the United States (1930–1949) Timeline of the history of the United States (1950–1969) Timeline of the history of the United States (1970–1989) Timeline of the history of the United States (1990–2009) Timeline of the history of the United States (2010–present) List of years in the United States
The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
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.
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War