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CHAPTER PAGS I Introduction
The Discovery of Radioactivity
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absorbed absorption accumulation actinium active deposit alpha particles alpha radiation alpha rays aluminium amount of energy amount of radium atomic weight beta particles beta radiation beta rays bulb carnotite cent chapter charge carried chemical computed considered contained corpuscular radiation Course prepared especially curie curve decay decrease deflected derivatives determined disintegration distance effect electrical electrolysis element equal equation equilibrium ERNEST DORSEY filtration gamma radiation gamma rays gases given gram of radium greater half-value period half-value thickness helium Hence increase intensity ionization layer liquid measured mercury mesothorium methods milligram molecules negative electrons number of atoms penetrating PHYSICS OF RADIOACTIVITY plate point source produced pump radio-element radioactive materials radium bromide radium chloride radium content radium emanation radium salt radium-C ratio removed result Rutherford solution stop-cocks surface temperature thorium thorium-X tion tissues transformation tube unit uranium uranium-Y velocity waves x-rays