Science and Life: Aberdeen AdressesE. P. Dutton, 1920 - 229 páginas |
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Página 19
... quantity of each member of the series , coexisting with its parent , is proportional to its period of life . For it is a balanced or equilibrium quantity , when the rate of formation equals the rate of change . The more quickly changing ...
... quantity of each member of the series , coexisting with its parent , is proportional to its period of life . For it is a balanced or equilibrium quantity , when the rate of formation equals the rate of change . The more quickly changing ...
Página 90
... natural minerals in which uranium occurs , such as pitchblende , M. and Mme . Curie discovered therein several intensely RADIUM 91 radioactive new elements in almost infinitesimal quantity , 90 THE EVOLUTION OF MATTER.
... natural minerals in which uranium occurs , such as pitchblende , M. and Mme . Curie discovered therein several intensely RADIUM 91 radioactive new elements in almost infinitesimal quantity , 90 THE EVOLUTION OF MATTER.
Página 91
... quantity , not more than one part in five or ten millions of the mineral at most . Small as the quantity was , they succeeded in isolating the com- pounds of radium in the pure state , and ultimately accumulated enough , not only for a ...
... quantity , not more than one part in five or ten millions of the mineral at most . Small as the quantity was , they succeeded in isolating the com- pounds of radium in the pure state , and ultimately accumulated enough , not only for a ...
Página 92
... quantity of energy nearly two thousand times as much as is obtainable from fuel has been given out by the radium ... quantities of substances , to which , however , by far the greater part of the radioactivity was due . After removal the ...
... quantity of energy nearly two thousand times as much as is obtainable from fuel has been given out by the radium ... quantities of substances , to which , however , by far the greater part of the radioactivity was due . After removal the ...
Página 93
... quantities of material involved in these processes are so minute that they are far beyond the limit of detection by ... quantity of the new materials was formed . Nevertheless the characteristic radioactivity they produce enables them ...
... quantities of material involved in these processes are so minute that they are far beyond the limit of detection by ... quantity of the new materials was formed . Nevertheless the characteristic radioactivity they produce enables them ...
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a-particle Aberdeen actinium active æsthetic ancient animal Arts atomic number atomic weight B-ray bismuth branch British Science Guild Carnegie Trust cent century chemical character chemical elements chemist chemistry classical coal commercial education conception creative definite direct discovery disintegration electricity electrons emanation energy evolved existence expelled experimental external Faculty FREDERICK SODDY fundamental H. H. Asquith helium hitherto human ideals inanimate universe investigation ionium isotopes J. J. Thomson knowledge known labour lead living mass material means mechanism ment million mind minerals modern nation nature original past Periodic Law periodic table philosophy physical pitchblende polonium practical present problem processes pure quantity radio-elements radioactive change radium radium-C recognised regard scientific study Scotland Soddy spectroscopic spectrum spirit study and research subjects teaching technical or commercial thallium thought tion to-day transmutation truth ultimate University of Aberdeen uranium and thorium uranium-X wealth whole