The Radioactive Substances: Their Properties and BehaviourK. Paul, Trench, Trübner & Company, Limited, 1908 - 301 pagini |
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Pagina 50
... MINERALS AND THE DISCOVERY OF RADIUM , POLONIUM , AND ACTINIUM Two radioactive elements having been dis- covered it is not unnatural that systematic investigations were made of various minerals known to contain these two elements ...
... MINERALS AND THE DISCOVERY OF RADIUM , POLONIUM , AND ACTINIUM Two radioactive elements having been dis- covered it is not unnatural that systematic investigations were made of various minerals known to contain these two elements ...
Pagina 51
... minerals contain- ing uranium . Madame Curie showed that this content of radioactive material varied greatly , and what was of the greatest im- portance was that certain minerals were more active even than metallic uranium itself . This ...
... minerals contain- ing uranium . Madame Curie showed that this content of radioactive material varied greatly , and what was of the greatest im- portance was that certain minerals were more active even than metallic uranium itself . This ...
Pagina 52
... minerals as pitchblende from Joachim- stal cannot be entirely due to uranium , for it would be less radioactive than it is found to be , even if it consisted of pure uranium . This striking discovery was the starting point of the ...
... minerals as pitchblende from Joachim- stal cannot be entirely due to uranium , for it would be less radioactive than it is found to be , even if it consisted of pure uranium . This striking discovery was the starting point of the ...
Pagina 80
... minerals from which the radioactive elements are obtained are precisely those from which the gas helium , discovered by Sir William Ramsay , may be obtained . This gas was shown to have a density of 1.98 compared with hydrogen as unity ...
... minerals from which the radioactive elements are obtained are precisely those from which the gas helium , discovered by Sir William Ramsay , may be obtained . This gas was shown to have a density of 1.98 compared with hydrogen as unity ...
Pagina 241
... mineral , for it is known from geological data that these minerals have existed in their present state for many thou- R sands of years . It is therefore evident that although RADIOACTIVE TRANSFORMATIONS 241.
... mineral , for it is known from geological data that these minerals have existed in their present state for many thou- R sands of years . It is therefore evident that although RADIOACTIVE TRANSFORMATIONS 241.
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Termeni și expresii frecvente
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