Science and Life: Aberdeen AddressesJ. Murray, 1920 - 229 páginas |
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Página 18
... thorium , each stand , as it were , at the head of a long genealogical table , comprising some fourteen members in the first , and twelve members in the second case , before the processes come to an end and the outflow of energy ...
... thorium , each stand , as it were , at the head of a long genealogical table , comprising some fourteen members in the first , and twelve members in the second case , before the processes come to an end and the outflow of energy ...
Página 19
... thorium , which were well studied by chemists for a century , so feeble is their radioactivity and so slow their rate of disintegration , without a suspicion that , in them , the oft - suspected process of the evolution of the elements ...
... thorium , which were well studied by chemists for a century , so feeble is their radioactivity and so slow their rate of disintegration , without a suspicion that , in them , the oft - suspected process of the evolution of the elements ...
Página 20
... thorium spread over a term of thousands of millions of years . The effects are small but enduring , and , almost imperceptible in themselves , come to maturity in due time in the cosmical calendar . Small as is the proportion of uranium ...
... thorium spread over a term of thousands of millions of years . The effects are small but enduring , and , almost imperceptible in themselves , come to maturity in due time in the cosmical calendar . Small as is the proportion of uranium ...
Página 21
... amongst the most complex sorts of atoms known to the chemist . All heavy elements , presumably , if they could be transmuted artificially into lighter ones , would evolve E energy on the same scale as uranium , thorium and.
... amongst the most complex sorts of atoms known to the chemist . All heavy elements , presumably , if they could be transmuted artificially into lighter ones , would evolve E energy on the same scale as uranium , thorium and.
Página 22
Aberdeen Addresses Frederick Soddy. energy on the same scale as uranium , thorium and radium . Such transmutations are still beyond the power of man to effect , but he would be a bold prophet who would declare for how long a time this ...
Aberdeen Addresses Frederick Soddy. energy on the same scale as uranium , thorium and radium . Such transmutations are still beyond the power of man to effect , but he would be a bold prophet who would declare for how long a time this ...
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Términos y frases comunes
a-particle actinium active ancient animal 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 complete 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 important inanimate universe investigation ionium isotopes J. J. Thomson knowledge known labour lead living material means mechanism ment million mind minerals modern nation nature original past Periodic Law periodic table philosophy physical pitchblende polonium practical present problem processes Professor progress pure quantity radio-elements radioactive change radium 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