The Radioactive Substances: Their Properties and Behaviour

absorption actinium active deposit Alpha rays aluminium atomic weight barium Becquerel bismuth Boltwood cathode rays centimetres charge carried charged particles chemical considered consist contained corpuscles crystals decay curves deflected density detected discovery effect electric field electrolysis electrometer electroscope emana experiments exposed fact fluorescence formed gases gramme of radium heat helium hydrogen increased insulated investigation ionization J. J. Thomson known layers light Madame Curie magnetic field matter measured metals method millimetres minerals negative ions negatively charged obtained passing phenomena Phil pitchblende polonium positive charge potential 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 seen separated shown solution temperature thickness thorium thorium emanation tion transformed tube uranium velocity vessel weight of radium wire