Paul Émile (François) Lecoq de Boisbaudran (April 18, 1838 - May 28, 1912) was a French chemist born in Cognac. In 1858 he joined the family wine-making business, but a year later was working as a chemist. April 18 is the 108th day of the year in the Gregorian calendar (109th in leap years). ... | Jöns Jakob Berzelius, discoverer of protein 1838 was a common year starting on Monday (see link for calendar). ... May 28 is the 148th day of the year in the Gregorian calendar (149th in leap years). ... 1912 (MCMXII) was a leap year starting on Monday in the Gregorian calendar (or a leap year starting on Tuesday in the 13-day-slower Julian calendar). ... A chemist pours from a Florence flask. ... Cognac is a commune in the French département of Charente, of which it is a sous-préfecture. ... 1858 (MDCCCLVIII) is a common year starting on Friday of the Gregorian calendar (or a common year starting on Sunday of the 12-day-slower Julian calendar). ... Wine is an alcoholic beverage produced by the fermentation of the juice of fruits, usually grapes. ...

In 1874 he wrote Spectres lumineux, spectres prismatiques, et en longeurs d'ondes destines aux recherche de chimie minerale, which was published in Paris by Gauthier-Villars and was one of the first descriptions of the new science of spectroscopy developed by Kirchhoff. In 1875 he used this method to discover the element gallium, which he named after the Latin word for Gaul, Gallia. He found the metal in a sample of zinc ore from the Pyrenees. A year later he isolated the element by electrolysis. It was later claimed that Lecoq had named the element after himself, since gallus is the Latin translation of the French le coq, but Lecoq denied this in an article of 1877. The existence of gallium had been predicted in 1871 by Mendeleev, who called it eka-aluminium, and its discovery was a boost for Mendeleev's theory of the periodic table. Later Lecoq discovered samarium (1880), gadolinium (1885) and dysprosium (1886). 1874 (MDCCCLXXIV) was a common year starting on Thursday (see link for calendar). ... Part of the Paris skyline with from left to right: Montparnasse Tower, Eiffel Tower, and in the background, towers of neighboring La Défense. ... Extremely high resolution spectrum of the Sun showing thousands of elemental absorption lines (fraunhofer lines) Spectroscopy is the study of matter by investigating light, sound, or particles that are emitted, absorbed or scattered by the matter under investigation. ... Gustav Robert Kirchhoff (March 12, 1824 - October 17, 1887), a German physicist who contributed to the fundamental understanding of electrical circuits, spectroscopy, and the emission of black-body radiation by heated objects. ... 1875 (MDCCCLXXV) was a common year starting on Friday (see link for calendar). ... The periodic table of the chemical elements A chemical element, often called simply an element, is a substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical processes. ... General Name, Symbol, Number gallium, Ga, 31 Chemical series poor metals Group, Period, Block 13, 4, p Appearance silvery white   Atomic mass 69. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Map of Gaul circa 58 BC Gaul (Latin Gallia, Greek Galatia) was the region of Western Europe occupied by present day northern Italy, France, Belgium, western Switzerland and the parts of the Netherlands and Germany on the west bank of the Rhine river. ... General Name, Symbol, Number zinc, Zn, 30 Chemical series transition metals Group, Period, Block 12, 4, d Appearance bluish pale gray Atomic mass 65. ... Central Pyrenees. ... It has been suggested that Electrolytic process be merged into this article or section. ... 1871 (MDCCCLXXI) was a common year starting on Sunday (see link for calendar). ... Mendeleyevs portrait by Ilya Repin. ... The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. ... General Name, Symbol, Number samarium, Sm, 62 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 150. ... 1880 (MDCCCLXXX) was a leap year starting on Thursday (see link for calendar). ... General Name, Symbol, Number gadolinium, Gd, 64 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 157. ... 1885 (MDCCCLXXXV) is a common year starting on Thursday. ... General Name, Symbol, Number dysprosium, Dy, 66 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 162. ... 1886 (MDCCCLXXXVI) is a common year starting on Friday (click on link to calendar) // Events January 18 - Modern field hockey is born with the formation of The Hockey Association in England. ...

Lecoq contributed further to the development of the periodic classification of elements by proposing, soon after its discovery, that argon was a member of new, previously unsuspected, group of elements, later to become known as the noble gases. General Name, Symbol, Number argon, Ar, 18 Chemical series noble gases Group, Period, Block 18, 3, p Appearance colorless Atomic mass 39. ... sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex... For the musical band, see Noble Gas (band) The noble gases are the chemical elements in group 18 (old-style Group 0) of the periodic table. ...

He died in Paris at the age of 74. Part of the Paris skyline with from left to right: Montparnasse Tower, Eiffel Tower, and in the background, towers of neighboring La Défense. ...