Science and Life: Aberdeen AddressesJ. Murray, 1920 - 229 páginas This work is a collection of addresses and articles written at Aberdeen University regarding the interaction between science and society. |
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Página 98
... helium or of hydrogen , but strong indirect evidence of a very HELIUM PRODUCED BY RADIUM 99 remarkable character favoured helium . 98 THE EVOLUTION OF MATTER.
... helium or of hydrogen , but strong indirect evidence of a very HELIUM PRODUCED BY RADIUM 99 remarkable character favoured helium . 98 THE EVOLUTION OF MATTER.
Página 99
Aberdeen Addresses Frederick Soddy. HELIUM PRODUCED BY RADIUM 99 remarkable character favoured helium . Thus helium , though it forms no compounds , is found in minerals containing uranium and thorium , only in the minerals containing ...
Aberdeen Addresses Frederick Soddy. HELIUM PRODUCED BY RADIUM 99 remarkable character favoured helium . Thus helium , though it forms no compounds , is found in minerals containing uranium and thorium , only in the minerals containing ...
Página 100
... helium and the expulsion of each particle must lower the atomic mass of the parent atom by 4 units . So long as the process of disintegration of the atom is proceeding , the rays emitted and the energy they possess afford the necessary ...
... helium and the expulsion of each particle must lower the atomic mass of the parent atom by 4 units . So long as the process of disintegration of the atom is proceeding , the rays emitted and the energy they possess afford the necessary ...
Página 101
... helium per gram . of uranium in a uranium mineral signifies 9,000,000 years , and as here helium , being a gas that forms no compounds , cannot have been initially present , and as , moreover , some will have escaped - the age of the ...
... helium per gram . of uranium in a uranium mineral signifies 9,000,000 years , and as here helium , being a gas that forms no compounds , cannot have been initially present , and as , moreover , some will have escaped - the age of the ...
Página 118
... . The foregoing applies so long as the changes continue . When they are finished and it is a question of ascertaining the ultimate products , the PRODUCTION OF HELIUM AND LEAD 119 task may be likened 118 CONCEPTION OF THE CHEMICAL ELEMENT.
... . The foregoing applies so long as the changes continue . When they are finished and it is a question of ascertaining the ultimate products , the PRODUCTION OF HELIUM AND LEAD 119 task may be likened 118 CONCEPTION OF THE CHEMICAL ELEMENT.
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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 direction 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 religion scientific study Scotland Soddy spectroscopic spectrum spirit study and research subjects successive teaching technical or commercial thallium thought tion to-day transmutation truth ultimate University of Aberdeen uranium and thorium wealth whole