Science and Life: Aberdeen AdressesE. P. Dutton, 1920 - 229 páginas |
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Página 95
... actinium and the other new intensely active radio - elements she discovered in such infinitesimal amount in pitchblende were in all probability the products of the change of the parent element uranium . The view carries with it the ...
... actinium and the other new intensely active radio - elements she discovered in such infinitesimal amount in pitchblende were in all probability the products of the change of the parent element uranium . The view carries with it the ...
Página 99
... is only th of a milligram by weight - a quantity unweighable on the most sensi- tive chemical balance - or II cubic millimetres by volume . Helium has also been detected as a product of polonium , actinium and other of the new.
... is only th of a milligram by weight - a quantity unweighable on the most sensi- tive chemical balance - or II cubic millimetres by volume . Helium has also been detected as a product of polonium , actinium and other of the new.
Página 100
Aberdeen Adresses Frederick Soddy. product of polonium , actinium and other of the new radio - elements . Gradually the tangled and complex succession of changes being undergone by uranium and thorium have been straightened out , and it ...
Aberdeen Adresses Frederick Soddy. product of polonium , actinium and other of the new radio - elements . Gradually the tangled and complex succession of changes being undergone by uranium and thorium have been straightened out , and it ...
Página 105
... actinium . are now known to occupy Nos . 84 and 89. The three radioactive emanations of Rutherford , products of radium , actinium and thorium respectively , are chemically analogous to Ramsay's inert family of atmospheric gases , and ...
... actinium . are now known to occupy Nos . 84 and 89. The three radioactive emanations of Rutherford , products of radium , actinium and thorium respectively , are chemically analogous to Ramsay's inert family of atmospheric gases , and ...
Página 113
... actinium , was a purely experimental conclusion reached before any theory whatever as to the nature of radioactivity had been advanced . Another constituent responsible for part of the radioactivity we called thorium - X . It is left in ...
... actinium , was a purely experimental conclusion reached before any theory whatever as to the nature of radioactivity had been advanced . Another constituent responsible for part of the radioactivity we called thorium - X . It is left in ...
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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