The Radioactive Substances: Their Properties and BehaviourK. Paul, Trench, Trübner & Company, Limited, 1908 - 301 pagini |
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Pagina 49
... elements exhibited this new property , and it was not long before Schmidt and Madame Curie independently discovered that thorium compounds emitted rays similar in many respects to those given out by uranium ; but , as will appear later ...
... elements exhibited this new property , and it was not long before Schmidt and Madame Curie independently discovered that thorium compounds emitted rays similar in many respects to those given out by uranium ; but , as will appear later ...
Pagina 50
... elements having been dis- covered it is not unnatural that systematic investigations were made of various minerals known to contain these two elements . Madame Curie first showed that the relative radio- activities of uranium compounds ...
... elements having been dis- covered it is not unnatural that systematic investigations were made of various minerals known to contain these two elements . Madame Curie first showed that the relative radio- activities of uranium compounds ...
Pagina 51
... elements , radium and actinium . To return to the consideration of the relative activity of various minerals contain- ing uranium . Madame Curie showed that this content of radioactive material varied greatly , and what was of the ...
... elements , radium and actinium . To return to the consideration of the relative activity of various minerals contain- ing uranium . Madame Curie showed that this content of radioactive material varied greatly , and what was of the ...
Pagina 52
... elements , polonium and radium . A third radioactive element , actinium , was subsequently isolated from pitch- blende by Debierne.1 The method of procedure in separating 1 Debierne , Comptes Rendus , CXXIX , p . 593 , 1899 ; CXXX , p ...
... elements , polonium and radium . A third radioactive element , actinium , was subsequently isolated from pitch- blende by Debierne.1 The method of procedure in separating 1 Debierne , Comptes Rendus , CXXIX , p . 593 , 1899 ; CXXX , p ...
Pagina 53
... elements closely resemble chemically the non - active elements with which they are carried down , their further purification is of considerable difficulty , par- ticularly as the quantities of the substances to be dealt with are ...
... elements closely resemble chemically the non - active elements with which they are carried down , their further purification is of considerable difficulty , par- ticularly as the quantities of the substances to be dealt with are ...
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absorption actinium active deposit ALPHA RAYS aluminium atomic weight barium Becquerel bismuth Boltwood cathode rays centimetres charge carried charged particles chemical considered contained corpuscles crystals Curie and Danne deflected density detected discovery effect electric field electrolysis electrometer electroscope emana experiments exposed fact fluorescence formed Fourth Edition gases gramme of radium heat helium hydrogen Illustrations insulated ionization J. J. Thomson known light LL.D Madame Curie magnetic field matter measured metals method minerals nature negative ions negatively charged obtained passing phenomena Phil pitchblende polonium present pressure produced properties quantity of emanation quantity of radium radiation emitted radio radioactive bodies radioactive elements radioactive substances radium bromide radium chloride radium emanation radium salt rate of decay removed Röntgen rays Rutherford Rutherford and Soddy seen separated shown solution temperature thorium thorium emanation tion transformed tube uranium velocity vessel weight of radium wire