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Greek philosopher Aristotle lists four known element at the time earth, air, fire & water." From this he purposed the four element theory.
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Greek philosopher "Democritus" propose the first ever idea of the existence of the indivisible particle "atoms".
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The earlist known report of the discovery of Mercury is dated back to around 500BC-510BC
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By German alchemist Hennig Brand. Found by boiling, filtering and otherwise processing as many as 60 buckets of urine.
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Cobalt is discovered by a Swedish chemist Georg Brandt.
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Platinum is discovered by General Antonio de Ulloa
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By the Swedish chemist Axel Fredrik Cronstedt.
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Scottish physician Joseph Black isolated carbon dioxide in which he purposes that the isolated air is "fixed air"
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Discovered by Joseph Black in England.
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By English chemist and physicist Henry Cavendish.
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By Scottish chemist Daniel Rutherford.
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By a Swedish scientist, Carl Willam Scheele.
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Discovered by Swedish chemist Johann Gottlieb Gahn.
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Disovered by English chemist Joseph Priestley and Swedish chemist Carl Wilhelm Scheele.
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Discovered by Swedish chemist, Carl Welhelm Scheele
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Austrian mineralogist Franz-Joseph Müller von Reichenstein discovers the element in a gold ore near Sibiu, Romania.
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In 1783, José and Fausto Elhuyar isolate tungsten with the reduction of wolframite acid with charcoal.
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By German chemist Martin Heinrich Klaproth.
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Discovered by English clergyman William Gregor.
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Discovered by by the English chemist Charles Hatchett.
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Discovered by the English chemist Charles Hatchett.
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Swedish chemist and mineralogist Anders Gustaf Ekeberg discovers Tantalum.
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Found by Jakob Berzelius and Wilhelm Hisinger and Martin Heinrich Klaproth.
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John Dalton proposed an "atomic theory" that discussed that atoms are indivisible and indestructible, that atoms that were in a specific element are identical in mass and properties. He also stated that compounds are formed by two or more atoms.
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Discovered by Mexican chemist Andrés Manuel del Río
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Discovered by English chemist William Hyde Wollaston, two years before English chemist Smithson Tennant discovers it.
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Discovered by English chemist Smithson Tennant.
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English chemist Smithson Tennant discovers Osmium.
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Discovered and isolated by English chemist Sir Humphry Davy and reported to the public by his colleagues.
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English chemist Sir Humphry Davy discovers three more elements over the course of one year.
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Discovered by the French chemist Bernard Courtois.
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Discovered by Swedish chemist Johan August Arfwedson.
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Discovered by German chemist Friedrich Stromeyer. Wasn't isolated till 1818.
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Discovered by Swedish chemists Jöns Jacob Berzelius and Johan Gottlieb Gahn.
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Discovered by Jöns Jacob Berzelius, a Swedish chemist.
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Discovered by Danish chemist and physicist Hans Christian Oersted.
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C. Lowg in Germany and Antoine-Jérôme Balard in France discover Bromine.
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Discovered and isolated by Swedish chemist Jöns Jakob Berzelius.
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Swedish chemist, Carl Gustaf Mosander discovers Lanthanum
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Both discovered by Swedish chemist, Carl Gustaf Mosander.
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Russian scientist Karl Ernst Claus discovers the element and isolated it the following year.
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Discovered by German chemists, Robert Wilhelm Bunsen and Gustav Robert Kirchhoff.
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Discovered by German chemists Robert Bunsen and Gustav Kirchhoff.
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Discovered by British physicist Sir William Crookes.
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Geologist, A.E.Beguyer de Chancourtois presented to the French Academy of Sciences, the use of atomic weights to reveal that the elements were arranged according to their atomic weights with similar elements occurring at regular intervals. This data was presented on a table known as the ‘telluric screw’. based on tables used in geology at the time.
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Discovered by erman chemists Ferdinand Reich and Hieronymus Theodor Richter.
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English chemist John Newlands noticed that, if the elements were arranged in order of atomic weight, there was a periodic similarity every 8 elements.
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In 1869, Russian chemist Dmitri Mendeleev presented to the public a periodic table based on atomic weights but arranged ‘periodically’. On this table, know elements with similar properties appeared under each other, but due to the lack of found elements; numerous gaps were left for future discoveries of elements.
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Discovered by Paul-Émile Lecoq de Boisbaudran.
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Discovered by the Swiss chemist Jean-Charles-Galissard de Marignac.
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Discovered by Marc Delafontaine and Jacques-Louis Soret in Switzerland.
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Discovered by Swedish chemists; Per Theodor Cleve and Lars Fredrik Nilson.
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Discovered by French chemist, Jean Charles Galissard de Marignac in Switzerland.
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Discovered by a Swiss chemist, Jean Charles Galissard de Marignac.
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Discovered by Carl F. Auer von Welsbach, a German chemist.
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Discovered by French physicist Antoine Bequerel as he discovered by accident that uranium salts emitted a penetrating radiation that could be registered on a photographic plate, with this led him to futher investigation which led Antoine that this "radiation" was different and needed to be recorded.
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Discovered by Scottish chemist William Ramsay. He also discovered that these newly discovered elements needed to be put into a group of their own due to their atomic weight and unique structure.
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New Zealand physicist and chemist "Ernest Rutherford" annouces that radioactivity is caused by the breakdown of atoms.
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Discovered by New Zealand physicist and chemist "Ernest Rutherford"
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English physicist Henry Moseley, provided atomic numbers based on the number of electrons in an atom. He also stated that if currently discovered and yet to be discovered elements were to be arranged in order of their atomic number rather than the element's atomic weight, they give a better fit and structure within the ‘periodic table’.
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New Zealand physicist and chemist "Ernest Rutherford" states that protons exist in atomic nucleuses.
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Discovered by english physicist James Chadwick. James Chadwick purpose and recorded that they must be had been something else in a atom besides charged electrons and from this he investgated atoms in known/discovered elements to eventully discovering that near the existence of protons and electrons, neutrons existed as well.
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American scientist, Glenn Seaborg along with his colleagues discovered the elements from atomic numbers 94 to 102. Upon discovering these elements, the periodic table was changed to fit these elements. They become the the actinide series of the periodic table.
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Glenn Seaborg and his colleagues discover, Plutonium, Americium, Berkelium and Curium
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Discovered by Albert Ghiorso and his co-workers at the University of California at Berkeley.