The Radioactive Substances: Their Properties and BehaviourK. Paul, Trench, Trübner & Company, Limited, 1908 - 301 pagini |
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Pagina 43
... become quite unreliable . This precaution necessitates enclosing all wires connected to the electrometer in metallic tubes , and also the keys such as K ( Fig . 6 ) connected to the instrument have to be in metallic cases and raised and ...
... become quite unreliable . This precaution necessitates enclosing all wires connected to the electrometer in metallic tubes , and also the keys such as K ( Fig . 6 ) connected to the instrument have to be in metallic cases and raised and ...
Pagina 56
... by fractionating the bromides instead of the chlorides . As the fractionation goes on , the crystals become more and more coloured if left to stand , assuming successively as the purification proceeds 56 THE RADIOACTIVE SUBSTANCES.
... by fractionating the bromides instead of the chlorides . As the fractionation goes on , the crystals become more and more coloured if left to stand , assuming successively as the purification proceeds 56 THE RADIOACTIVE SUBSTANCES.
Pagina 83
... become negatively charged as the rays leave it , and that any insulated solid obstacle placed in the path of the rays would become positively charged . If , however , an experiment is per- formed in which the a rays are allowed to fall ...
... become negatively charged as the rays leave it , and that any insulated solid obstacle placed in the path of the rays would become positively charged . If , however , an experiment is per- formed in which the a rays are allowed to fall ...
Pagina 102
... become a more effective ionizer , after which it suddenly loses its power of producing ions at all , as is seen from the portion of the curve B. On allowing the radium to stand for a month it gradually regained the power which it ...
... become a more effective ionizer , after which it suddenly loses its power of producing ions at all , as is seen from the portion of the curve B. On allowing the radium to stand for a month it gradually regained the power which it ...
Pagina 116
... become charged with negative electricity . The experiment was tried by Madame Curie , but at first without success . The reasons of failure were twofold . In the first place it is necessary to absorb the a rays by a thin metal leaf ...
... become charged with negative electricity . The experiment was tried by Madame Curie , but at first without success . The reasons of failure were twofold . In the first place it is necessary to absorb the a rays by a thin metal leaf ...
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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