Jean Servais Stas (August 21, 1813 - December 13, 1891) was a Belgian analytical chemist. August 21 is the 233rd day of the year (234th in leap years) in the Gregorian Calendar. ... 1813 is a common year starting on Friday (link will take you to calendar). ... December 13 is the 347th day of the year (348th in leap years) in the Gregorian calendar. ... 1891 was a common year starting on Thursday (see link for calendar). ... // Introduction The fundamental component of chemistry is that it involves matter in some way (this explains its broad reach). ...

Stas was born in Leuven and trained initially as a physician. He later switched to chemistry and worked at the École Polytechnique in Paris under the direction of Jean-Baptiste Dumas, with whom he established the atomic weight of carbon. // Location The Gothic Leuven Town Hall Leuven listen â–¶(?) is the capital of the Belgian province of Flemish Brabant. ... Physician examining a child The word physician should not be confused with physicist, which means a scientist in the area of physics. ... // Introduction The fundamental component of chemistry is that it involves matter in some way (this explains its broad reach). ... The Eiffel Tower has become a symbol of Paris throughout the world. ... Jean Baptiste Andr Dumas Jean Baptiste Andr Dumas (July 14, 1800 - April 10, 1884), French chemist, best known for his works on organic analysis and synthesis, as well as the determination of atomic weights (relative atomic masses) by measuring vapor densities. ... ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ...

In 1840, he was appointed professor at the Royal Military School in Brussels. He acquired international fame by establishing the atomic weights of the elements more accurately than had ever been done before, using oxygen = 16 as a standard. His results disproved the hypothesis of the English physicist William Prout that all atomic weights must be integral multiples of that of hydrogen. Stas thus laid the foundations for the formation of the periodic system of elements by (among others) Dmitri Mendeleev. 1840 is a leap year starting on Wednesday (link will take you to calendar). ... Emblem of the Brussels-Capital Region Flag of The City of Brussels Brussels (French: Bruxelles, Dutch: Brussel, German: Brüssel) is the capital of Belgium, the French community of Belgium, the Flemish community and of the European Union. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... William Prout (January 15, 1785 – April 9, 1850) was an English chemist and physician. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements first created in 1869 by Russian chemist Dmitri Mendeleev. ... Portrait of Dmitri Mendeleyev by Ilya Repin Dmitri Ivanovich Mendeleyev (Russian: listen ▶(?)) (8 February (O.S. 27 January) 1834 in Tobolsk – 2 February (O.S. 20 January) 1907 in Saint Petersburg), was a Russian chemist. ...

Stas retired in 1869 because of problems with his voice caused by a throat ailment. He became commissioner of the mint, but resigned in 1872 because he disagreed with the government's monetary policy. Jean Stas died in Brussels. 1869 is a common year starting on Friday (link will take you to calendar). ... 1872 was a leap year starting on Monday (see link for calendar). ... Emblem of the Brussels-Capital Region Flag of The City of Brussels Brussels (French: Bruxelles, Dutch: Brussel, German: Brüssel) is the capital of Belgium, the French community of Belgium, the Flemish community and of the European Union. ...