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  1. Isotopes / by F.W. Aston by Francis William (1877-) Aston, 1924-01-01
  2. Nobelpreisträger Für Chemie: Marie Curie, Ernest Rutherford, Otto Hahn, Francis William Aston, Manfred Eigen (German Edition)
  3. Isotopes by Francis William Aston, 2010-08-19
  4. Nobel Lectures Including Presentation Speeches and Laureates' Biographies. by Francis William, PREGL, Fritz, ZSIGMONDY, Richard Adolf et al. NOBEL. ASTON, 1966
  5. Isotopes and atomic weights. 299-310 pp. In: Notices of the proceedings at the meetings of the members of the Royal Institution of Great Britain with the abstracts of the discourses delivered at the evening meetings, Vol. XXIII. by Francis William (1877-1945). ASTON, 1924-01-01
  6. Mass Spectrometrists: Francis William Aston, Alfred Bucherer, Alfred O. C. Nier, Kenneth Bainbridge, Walter Kaufmann, Arthur Jeffrey Dempster
  7. Mass spectra and isotopes, by Francis William Aston, 1944
  8. Mass specra and isotopes: Being the twenty-sixth Robert Boyle lecture delivered before the Junior Scientific Club of the University of Oxford on 3rd June ... Junior Scientific Club Robert Boyle lecture) by Francis William Aston, 1924
  9. Francis William Aston

1. ThinkQuest : Library : Atom. The Incredible World.
FRANCIS WILLIAM ASTON. Francis William Aston lived in the years 18771945. He studied at Cambridge and was a Rutherford's student. After studies he became Thomson's assistant. he constructed a special device - a mass spectrograph. Aston researched 213 out of the total of 276 isotopes
http://library.thinkquest.org/19662/low/eng/biog-aston.html
Index Physical Science Chemistry
Atom. The incredible world.
This site presents problems and discoveries in experimental atomic physics. Textbook-like, its contents spans 2,000 years of history, starting with Democritus, the Greek philosopher. A special section on the twentieth century provides information on x-rays, radiation, and the quantum theory. Historical background information on the scientists helps develop an overview of the achievements in this area. The site is in English and Polish. Visit Site 1998 ThinkQuest Internet Challenge Languages English Polish Students Grzegorz XIV L.O. im. Stanislawa Staszica, Warszawa, Poland Tomasz XIV L.O. im. Stanislawa Staszica, Warszawa, Poland Gabriela 49 L.O. im. Johanna Wolfganga Goethego, Warszawa, Poland Coaches Stanislaw XIV L.O. im. Stanislawa Staszica, Warszawa, Poland Konrad IL L.O. im. Johanna Wolfganga Goethego, Warszawa, Poland Miroslawa Szkola Glowna Handlowa, Warszawa, Poland Want to build a ThinkQuest site? The ThinkQuest site above is one of thousands of educational web sites built by students from around the world. Click here to learn how you can build a ThinkQuest site.

2. Aston
Francis William Aston ( 18771945) English chemist and physicist born in Harborne, Birmingham. He was educated at the universities of Birmingham and Cambridge. In 1909 he became an assistant to J. J .
http://www.chem.uky.edu/courses/che105/biografy/aston.html
Francis William Aston
English chemist and physicist born in Harborne, Birmingham. He was educated at the universities of Birmingham and Cambridge. In 1909 he became an assistant to J. J. Thomson at Cambridge and worked with him on many studies with the parabola mass spectroscope. Aston returned to Cambridge after Word War I and constructed a new type of mass spectrograph and discovered the existence of isotopes in many elements (of 281 naturally-occurring isotopes, Aston discovered 212). He also calculated atomic weights from nuclidic masses and abundances, and brought about the use in physics of the mass of oxygen-16 as exactly 16, whence all other elements had nearly integer masses. He was awarded the Nobel Prize in Chemistry in 1922 for his development of the mass spectrograph, the discovery of isotopes of non-radioactive elements, and the enunciation of the whole number rule. In later years he measured with ever greater precision the nuclidic masses of many elements.

3. MSN Encarta - Search Results - Aston Francis William
Encarta Search results for aston francis william . Page 1 of 1. Found in the Hawaii(state) article. 7. Magazine and news articles about aston francis william *.
http://encarta.msn.com/Aston_Francis_William.html
MSN Home My MSN Hotmail Shopping ... Money Web Search: logoImg('http://sc.msn.com'); Encarta Subscriber Sign In Help Home ... Upgrade to Encarta Premium Search Encarta Encarta Search results for "Aston Francis William" Page of 1 Exclusively for MSN Encarta Premium Subscribers Aston, Francis William Article—Encarta Encyclopedia Aston, Francis William (1877-1945), British physicist and Nobel laureate, born in Harborne, Birmingham, England, and educated at Malvern College,... related items mass spectrometer study of isotopes Francis William Aston Picture—Encarta Encyclopedia Picture from Encarta Encyclopedia William Francis Giauque Article—Encarta Encyclopedia Giauque, William Francis (1895-1982), American chemist and Nobel laureate, best known for discovering a method for producing temperatures approaching... William Francis Giauque Picture—Encarta Encyclopedia Picture from Encarta Encyclopedia Bourdillon, Francis William (quotation) Quotation—Encarta Encyclopedia The night has a thousand eyes,
And the day but one;
Yet the light of the bright world dies

4. ASTON Francis William
Last updated 25.05.2001 142758. Francis William Aston byl britskýchemik a fyzik, žijící v letech 1877 1945. Je nositelem
http://www.volny.cz/michal_bachman/asto.htm
Last updated: 25.05.2001 14:27:58
Francis William Aston byl britský chemik a fyzik, žijící v letech
1877 - 1945. Je nositelem Nobelovy ceny za chemii z roku 1922 za objevy mnoha izotopù a pøístroje k jejich identifikaci - hmotnostního spektrografu (1919).
Optimální rozlišení - 1024x768, minimálnì 800x600. © Michal Bachman, 200 Veškeré ohlasy prosím sem

5. WIEM: Aston Francis William
edycji WIEM 2004. Multimedia, Ilustracje, Zdjecia aston francis william.Opis aston francis william. WIEM zostala opracowana na
http://wiem.onet.pl/wiem/011ac0.html
WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±!
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Aston Francis William
Opis:
Aston Francis William. WIEM zosta³a opracowana na podstawie Popularnej Encyklopedii Powszechnej Wydawnictwa Fogra zobacz wszystkie serwisy do góry

6. WIEM: Aston Francis William
aston francis william (18771945), fizyk i chemik brytyjski. Fizyka, Chemia,Wielka Brytania aston francis william (1877-1945). aston francis william.
http://wiem.onet.pl/wiem/0108c2.html
WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±!
Oferta specjalna abonamentów dla szkó³ i instytucji!
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Przedstawione poni¿ej has³o pochodzi z archiwalnej edycji WIEM 2001!
Prace redakcyjne nad edycj± 2001 zosta³y zakoñczone. Zapraszamy do korzystania z nowej, codziennie aktualizowanej i wzbogacanej w nowe tre¶ci edycji WIEM 2004 Fizyka, Chemia, Wielka Brytania
Aston Francis William
Aston Francis William Aston Francis William (1877-1945), fizyk i chemik brytyjski. Od 1920 profesor uniwersytetu w Cambridge, od 1921 cz³onek Royal Society. Uczeñ J.J. Thomsona, z którym wspólnie wykaza³ 1913 istnienie 2 trwa³ych izotopów neonu. 1919 zbudowa³ pierwszy spektrograf masowy , za pomoc± którego odkry³ wiêkszo¶æ naturalnych trwa³ych izotopów (ok. 212). Zaproponowa³ te¿ tzw. fizyczn± skalê mas atomowych, opart± wy³±cznie na izotopie tlenu O, dla którego przyjêto masê równ± dok³adnie 16 (poprzednio jednostk± masy atomowej by³a 1/16 masy atomu tlenu bez uwzglêdnienia sk³adu izotopowego tlenu). 1922 laureat Nagrody Nobla w dziedzinie chemii. G³. prace:

7. ASTON Francis William
Last updated 19.02.2004 165820. Francis William Aston byl britskýchemik a fyzik, žijící v letech 1877 1945. Je nositelem
http://nobelsoftware.com/vedci/asto.htm
Last updated: 19.02.2004 16:58:20
Francis William Aston byl britský chemik a fyzik, žijící v letech
1877 - 1945. Je nositelem Nobelovy ceny za chemii z roku 1922 za objevy mnoha izotopù a pøístroje k jejich identifikaci - hmotnostního spektrografu (1919).
Optimální rozlišení - 1024x768, minimálnì 800x600. © Michal Bachman, 200 Veškeré ohlasy prosím sem

8. Francis William Aston - Wikipedia
Translate this page Francis William Aston. aus Wikipedia, der freien Enzyklopädie. FrancisWilliam Aston (* 1. September 1877 in Harborne, † 20.
http://de.wikipedia.org/wiki/Francis_William_Aston
Francis William Aston
aus Wikipedia, der freien Enzyklopädie
Francis William Aston 1. September in Harborne 20. November in Cambridge ) war ein englischer Physiker , der als erster die Massenspektroskopie erfolgreich einsetzte. erhielt er den Nobelpreis für Chemie Views Persönliche Werkzeuge Navigation Suche Werkzeuge

9. Francis William Aston
Francis William Aston. Francis William Aston (18771956). Britishphysicist who won the Nobel Prize for Chemistry in 1922 for his
http://www.nobel-winners.com/Chemistry/francis_william_aston.html
Francis William Aston
Francis William Aston
British physicist who won the Nobel Prize for Chemistry in 1922 for his development of the mass spectrograph, a device that separates atoms or molecular fragments of different mass and measures those masses with remarkable accuracy. Aston used the mass spectrograph to discover a large number of nuclides, or nuclear species that differ in mass. The mass spectrograph is widely used in geology, chemistry, biology, and nuclear physics.
Aston was trained as a chemist, but, upon the rebirth of physics following the discovery of X rays in 1895 and of radioactivity in 1896, he began in 1903 to study the creation of X rays by the flow of current through a gas-filled tube. In 1910 he became an assistant to Sir J.J. Thomson at Cambridge, who was investigating positively charged rays emanating from gaseous discharges. During Aston's assistantship Thomson obtained, from experiments with neon, the first evidence for isotopes (atoms of the same element that differ in mass) among the stable (nonradioactive) elements. After World War I, Aston constructed a new type of positive-ray apparatus, which he named a mass spectrograph. It showed that not only neon but also many other elements are mixtures of isotopes. Aston's achievement is illustrated by the fact that he discovered 212 of the 287 naturally occurring nuclides.

10. Francis William Aston
Francis William Aston (18771945). Profesor uniwersytetu w Cambridge.Prowadzil badania nad promieniami kanalikowymi; wykazal
http://www.republika.pl/ewamalecka/uczeni/aston.htm
Francis William Aston (1877-1945)
Profesor uniwersytetu w Cambridge. Prowadzi³ badania nad: promieniami kanalikowymi; wykaza³ istnienie dwóch izotopów neonu w roku 1913. W roku 1919 zbudowa³ pierwszy spektrograf masowy, a co za tym idzie zidentyfikowa³ wiêkszo¶æ izotopów trwa³ych. Nagrodê Nobla otrzyma³ roku 1922.

11. MSN Encarta - Résultats De La Recherche - Aston Francis William
aston francis william . Page1 sur 1. Plus de résultats avec MSN pour aston francis william .
http://fr.encarta.msn.com/Aston_Francis_William.html
Accueil MSN Mon MSN Hotmail Rechercher ... S'abonner   Encarta Premium Rechercher Encarta R©sultats de la recherche pour "Aston Francis William" Page sur 1 R©serv© aux abonn©s MSN Encarta Premium. Aston, Francis William Encyclop©die EncartaArticle Aston, Francis William (1877-1945), physicien britannique. Francis William Aston Encyclop©die EncartaImage isotopes Encyclop©die EncartaArticle Trouv© dans l'article isotopes spectrom¨tre de masse Encyclop©die EncartaArticle Trouv© dans l'article spectrom¨tre de masse Giauque, William Francis Encyclop©die EncartaArticle Giauque, William Francis (1895-1982), chimiste am©ricain, connu pour sa d©couverte d'une m©thode appliqu©e pour g©n©rer des temp©ratures approchant... William Francis Giauque Encyclop©die EncartaImage Bacon, Francis (philosophe) Encyclop©die EncartaArticle Trouv© dans l'article Bacon, Francis (philosophe) ‰lisabeth I re Encyclop©die EncartaArticle Trouv© dans l'article ‰lisabeth I re Shakespeare, William Encyclop©die EncartaArticle Trouv© dans l'article Shakespeare, William

12. Aston
Francis William Aston byl britský chemik a fyzik, žijící v letech.1877 1945. Je nositelem Nobelovy ceny za chemii z roku 1922
http://www.jergym.hiedu.cz/~canovm/osobnost/asto.htm
1877 - 1945. Je nositelem Nobel
Francis William

13. ODKRYCIA W CHEMII I FIZYCE XIX I XX WIEKU
1913. aston francis william ( 1877 - 1945) wraz z Sir Josephem Johnem Thomsonem( 1856 - 1940) wykazal istnienie dwóch trwalych izotopów neonu .
http://www.uni.opole.pl/chemia/inst/dydakt/chron1.html
ODKRYCIA W CHEMII I FIZYCE XIX I XX WIEKU
Od 1898 roku do 1994 roku: Odkrycia cz¹stek elementarnych; Teorie chemiczne; Modele budowy atomu (Od modelu Thomsona do modelu Bohra- Sommerfelda); Kwarkowa struktura materii
Ernest Rutherford ( 1871 - 1937) udowodni³, ¿e promieniowanie uranu jest promieniowaniem z³o¿onym z co najmniej dwóch ró¿nych rodzajów promieniowania. Promieniowanie ,które ³atwo ulega absorpcji Rutherford nazwa³ promieniowaniem alfa. Drugi rodzaj promieniowania o bardziej przenikliwym charakterze nazwa³ promieniowaniem beta. Charakterystykê podan¹ przez Ernesta Rutherforda w 1899 r. w pracy " Uranium Radiation and the Electrical Condution Produced by It" - Phil. Mag., 47, 114, 1899 uzupe³nili inni badacze, którzy wykazali, ¿e promienie alfa i beta s¹ z³o¿one z cz¹stek elektrycznie na³adowanych. Cz¹stki te ulegaj¹ odchyleniu w polu magnetycznym i elektrostatycznym odchyleniu, lecz w przeciwnych kierunkach. Stosunek e/m dla promieniowania beta wyznaczony przez Becquerela Henri ( 1852 - 1908) mia³ tak¹ sam¹ wartoœæ jak zmierzony przez Thomsona Josepha ( 1856 -1940) dla promieni katodowych ( elektronów).

14. System Analysis - Cross Over Research - Metaphysics - Philosophy By Jörg Lenau
Translate this page Friedrich, Wundt Wilhelm, Yukawa Hideki, Achard Franz Karl, Adler Alfred, AndersonCarl David, Arkwright Sir Richard, aston francis william, Avogadro Amadeo
http://www.sya.de/
A strologische C harakteranalyse A strologische C harakteranalyse ... mail Abaelard Peter, Albategnius, Albert der Große (Albertus Magnus) , Anaxagoras, Anaximander, Anaximenes, Anselm von Canterbury, Archimedes, Aristarch(os) von Samos, Aristippos, Aristoteles, Augustinus, Avenarius Richard, Averroë (arab. Ibn Róschd) , Averroës, Avicenna, Baader Franz Xaver von, Bacon Francis, Bahnsen Julius, Baumgarten Alexander, Bavink Bernhard, Bayle Pierre, Bentham Jeremy, Bergson Henri, Berkeley George, Bernhard von Clairvaux, Boëthius, Bolzano Bernhard, Brentano, Bruno Giordano, Cassierer Ernst, Clausius Auguste, Cohen Hermann, Comte.Schleiermacher, Condillac Etienne Bonnet de, Cousin Victor, Croce, d'Alembert Jean le Rond, Dalton John, Demokrit (Demokritos) , Descartes René, Dewey John, Diderot Denis, Dilthey Wilhelm, Dingler Hugo, Diogenes Laërtius, Diogenes von Sinope, Diophantos von Alexandria, Donatus Aelius, Driesch, Dühring Eugen, Duns Scotus, Emerson Ralph Waldo, Empedokles von Akragas (Agrigent), Engels Friedrich, Epiktet, Epikur(os) von Samos, Eriguena, Espinas Alfred, Eudoxos aus Knidos, Euklid, Fechner Gustav Theodor, Feuerbach Ludwig, Fichte J.H., Fichte Johann Gottlieb, Fischer Kuno, Francis Bacon von Verulam, Freidrich der Große (II.), Fries Jakob Friedrich, Gassendi Petrus, Gemelli Agostino, Gentile, Geulincx, Gilson Etiennne, Giordano Bruno, Gorgias, Groce Benedetto, Guyau Jean Marie, Haller Karl Ludwig von, Haman Johann Georg, Hartmann E.v., Hartmann Eduard von, Hartmann N., Hegel Goerg Wilhelm Friedrich, Heidegger, Helvétius Claude-Adrien, Hemsterhuis Franz, Heraklit (Herakleitos) von Ephesos, Herbart Johann Friedrich, Herbert Edward Lord von Cherbury, Herder Johann Gottfried von, Heron (H. von Alexandria), Hertling Georg Graf von, Hippokrates (H. von Kos)
, Hobbes Thomas, Holbach Dietrich Baron von, Hume David, Husserl Edmund, Huxley Thomas Henry, Jacobi Friedrich Heinrich, Jaeger Werner, Jaensch Erich Rudolf, James William, Jansen Cornelius, Jaspers Karl, Jung Carl Gustav, Kant Immanuel, Keyserling Herrmann Graf von, Kierkegaard, Klages Ludwig, Klemens von Alexandria (Titus Flavius Clemens Alexandrianus) , Kluge Friedrich, Kratylos, Krause, Kung-(fu)tse (Kung-tse - Meister Kung) , Lamarck Jean-Baptiste de, Lamettrie Julien Offray de, Lange Friedrich Albert, Leibniz Gottfried Wilhelm Freiherr von, Leukippos (Leukipp) von Milet, Lipps Theodor, Locke John, Lotze Hermann, Mach Ernst, Maimon Salomon (Salomon ben Josua) , Maimonides Moses (Rabbi Mosche ben Maimon) , Maine de Biran François Pierre, Maistre Josef-Marie Comte de, Malebranche Nicolas de, Marx Karl, Meister Eckhart, Menge Hermann, Mengtse (Möng-tse eigtl. Meng Ko - Möng-Kho) , Montesquieu Charles de Secondat, Müller Adam Heinrich, Natorp Paul, Nietsche Friedrich, Nietzsche, Nikolaus von Kues, Nostradamus (Michel de Notre-Dame) , Ockham Wilhelm von, Oken Lorenz (eigentl. Ockenfuß) , Origenes, Ortega y Gasset José, Parmenides von Elea, Pascal, Peirce Charles Santiago Sanders, Philon, Plato(n), Platon, Plotin(os), Plutarch(os) (von Chäronea) , Poseidonios, Protagoras, Protagoras (aus Abdera) , Ptolemäus Claudius (grch. Ptolemaios) , Pufendorf Samuel Frhr. von, Pythagoras (von Samos) , Rickert, Roger Bacon, Rousseau Jean Jaques, Russell, Satre Jean Paul, Savigny Friedrich Carl von, Scheler, Schelling Friedrich Wilhelm Joseph, Schiller Ferdinand Canning Scott, Schopenhauer Arthur, Seneca, Shaftesbury, Shaftesbury Anthony Ashley Cooper Earl of, Smith Adam, Sokrates, Solowjew, Spengler Oswald, Spinoza Benedictus (Baruch d'Espinosa) , Stirner Max (eigentl. Kasper Schmidt) , Strauß, Suarez, Suëton(ius) Gajus S. 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McDougall), M(a)cMillan Edwin Mattison, Magnus Heinrich Gustav, Millikan Robert Andrews, Naumann Karl Friedrich, Nicol W., Papin Denis, Paracelsus (Humanistenname des Theophrastus Bombastus von Hohenheim), Pasteur Louis, Pauli Wolgang, Pauling Linus, Pettenkofer Max von, Pflüger Eduard Friedrich Wilh., Priestley Joseph, Ramsay Sir William, Rutherford Ernest, Sabatier Paul, Tesla Nicola, Thünen Johann Heinrich von, Weizsäcker Carl Friedrich Frhr. von, Weizsäcker Viktor Frhr. von

15. Francis W. Aston - Biography
francis W. aston – Biography. francis william aston was born in September 1877at Harborne, Birmingham, England, the third of a family of seven children.
http://www.nobel.se/chemistry/laureates/1922/aston-bio.html
Francis William Aston was born in September 1877 at Harborne, Birmingham, England, the third of a family of seven children. He was educated at Harborne Vicarage School and Malvern College where his interest in science was aroused. In 1894 he entered Mason College, Birmingham (later to become the University of Birmingham ) where he studied chemistry under Frankland and Tilden, and Physics under Poynting. His winning of the Forster Scholarship in 1898 enabled him to work on the optical properties of tartaric acid derivatives; the results of this work were published in 1901.
Leaving academic life for a time, he worked for three years as a chemist in the laboratory of a brewery. At about this time, however, his interest in physics, rather than chemistry, began to predominate; his aptitude for mechanical contrivance showed itself in his design and construction of new types of pumps for evacuating vessels. From this stemmed his interest in gas discharge phenomena in evacuated tubes.
In 1903 he obtained a scholarship to Birmingham University (as it had now become) to work on the properties of the Crookes Dark Space in discharge tubes. Within a short time he had discovered the phenomenon which is known as the Aston Dark Space. At the end of 1909 he accepted the invitation of

16. Aston, Francis William
aston, francis william. francis william aston. CorbisBettmann ( b. Sept. 1, 1877, Harborne, Birmingham, Eng.d. Nov. mass and measures those masses with remarkable accuracy. aston used the mass
http://www.britannica.com/nobel/micro/38_30.html
Aston, Francis William
Francis William Aston Corbis-Bettmann (b. Sept. 1, 1877, Harborne, Birmingham, Eng.d. Nov. 20, 1945, Cambridge, Cambridgeshire), British physicist who won the Nobel Prize for Chemistry in 1922 for his development of the mass spectrograph, a device that separates atoms or molecular fragments of different mass and measures those masses with remarkable accuracy. Aston used the mass spectrograph to discover a large number of nuclide s, or nuclear species that differ in mass. The mass spectrograph is widely used in geology, chemistry, biology, and nuclear physics. Aston was trained as a chemist, but, upon the rebirth of physics following the discovery of X rays in 1895 and of radioactivity in 1896, he began in 1903 to study the creation of X rays by the flow of current through a gas-filled tube. In 1910 he became an assistant to Sir J.J. Thomson at Cambridge, who was investigating positively charged rays emanating from gaseous discharges. During Aston's assistantship Thomson obtained, from experiments with neon, the first evidence for isotopes (atoms of the same element that differ in mass) among the stable (nonradioactive) elements. After World War I, Aston constructed a new type of positive-ray apparatus, which he named a mass spectrograph. It showed that not only neon but also many other elements are mixtures of isotopes. Aston's achievement is illustrated by the fact that he discovered 212 of the 287 naturally occurring nuclides.

17. Chemistry 1922
of the wholenumber rule . francis william aston. United Kingdom.University of Cambridge Cambridge, United Kingdom. b. 1877 d. 1945.
http://www.nobel.se/chemistry/laureates/1922/
The Nobel Prize in Chemistry 1922
"for his discovery, by means of his mass spectrograph, of isotopes, in a large number of non-radioactive elements, and for his enunciation of the whole-number rule" Francis William Aston United Kingdom University of Cambridge
Cambridge, United Kingdom b. 1877
d. 1945 The Nobel Prize in Chemistry 1922
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Francis W. Aston
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18. Francis William Aston
Born in Birmingham, England in September 1877, francis william aston was fascinated by science at an early age. In 1894, aston attended Birmingham University to study chemistry and physics.
http://www.nuclearfiles.org/rebios/aston.htm
home key issues history resources ... contact us Francis William Aston Born in Birmingham, England in September 1877, Francis William Aston was fascinated by science at an early age. In 1894, Aston attended Birmingham University to study chemistry and physics. Aston won the Forster Scholarship in 1898, allowing him to conduct research that was published in 1901. He began working as an assistant at Cavendish Laboratory in Cambridge in 1909 and conducted research on positive rays. Aston remained at Cavendish until1914 when World War I required his skills at the Royal Aircraft Establishment. After World War I ended, Aston returned to his studies at Cavendish, now focusing on isotopes. In 1919, Aston made his most significant contribution to atomic science with the invention of the mass spectrograph. The device was capable of separating isotopes by measuring the minute differences in their masses. Using the mass spectrograph, Aston successfully identified 212 existing isotopes. The invention also prompted him to devise his famous Whole Number Rule which states, "the mass of the oxygen isotope being defined, all the other isotopes have masses that are very nearly whole numbers." The rule became crucial to future developments in nuclear energy technology.

19. Francis William Aston Winner Of The 1922 Nobel Prize In Chemistry
francis william aston, a Nobel Prize Laureate in Chemistry, at the Nobel Prize Internet Archive. francis william aston. 1922 Nobel Laureate in Chemistry aston( submitted by Chris Shoemaker)
http://www.almaz.com/nobel/chemistry/1922a.html
F RANCIS W ILLIAM A STON
1922 Nobel Laureate in Chemistry
    for his discovery, by means of his mass spectrograph, of isotopes, in a large number of non-radioactive elements, and for his enunciation of the whole-number rule.
Background

    Residence: Great Britain
    Affiliation: Cambridge University
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20. Francis William Aston Winner Of The 1922 Nobel Prize In Chemistry
francis william aston, a Nobel Prize Laureate in Chemistry, at theNobel Prize Internet Archive. francis william aston. 1922 Nobel
http://almaz.com/nobel/chemistry/1922a.html
F RANCIS W ILLIAM A STON
1922 Nobel Laureate in Chemistry
    for his discovery, by means of his mass spectrograph, of isotopes, in a large number of non-radioactive elements, and for his enunciation of the whole-number rule.
Background

    Residence: Great Britain
    Affiliation: Cambridge University
Featured Internet Links

    Search WWW Search The Nobel Prize Internet Archive
Links added by Nobel Internet Archive visitors Back to The Nobel Prize Internet Archive
Literature
Peace Chemistry ... Medicine We always welcome your feedback and comments

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