Science and Life: Aberdeen AddressesJ. Murray, 1920 - 229 páginas |
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Página 102
... weight is less than it was by 4 units , but in its whole chemical nature and even in its spectrum , it is not merely like its original ISOTOPES 103 Elements parent . It is chemically identical with 102 THE EVOLUTION OF MATTER.
... weight is less than it was by 4 units , but in its whole chemical nature and even in its spectrum , it is not merely like its original ISOTOPES 103 Elements parent . It is chemically identical with 102 THE EVOLUTION OF MATTER.
Página 103
... isotopes . The recog- nition of such isotopes is fundamentally new , and cuts more deeply into old - established ideas of the nature of matter than even the surprising discoveries of the genesis of one element out of another . The ...
... isotopes . The recog- nition of such isotopes is fundamentally new , and cuts more deeply into old - established ideas of the nature of matter than even the surprising discoveries of the genesis of one element out of another . The ...
Página 105
... isotopes as they are called - are invariably identical in their whole chemical character . Ionium is isotopic with thorium , mesothorium I. with radium , and so on . To the chemist and the spectroscopist they would be taken as one . Not ...
... isotopes as they are called - are invariably identical in their whole chemical character . Ionium is isotopic with thorium , mesothorium I. with radium , and so on . To the chemist and the spectroscopist they would be taken as one . Not ...
Página 116
... isotopes , or elements occupying the same place in the periodic table , and the interpretation of the significance of the periodic law , -conceptions are arrived at which are not merely novel , but upsetting . In this phase , an aspect ...
... isotopes , or elements occupying the same place in the periodic table , and the interpretation of the significance of the periodic law , -conceptions are arrived at which are not merely novel , but upsetting . In this phase , an aspect ...
Página 130
... - particle caused a shift of one place in the opposite direction . Since the a - particle carries two atomic charges of positive ISOTOPES AND HETEROTOPES 131 electricity and the B - particle 130 CONCEPTION OF THE CHEMICAL ELEMENT.
... - particle caused a shift of one place in the opposite direction . Since the a - particle carries two atomic charges of positive ISOTOPES AND HETEROTOPES 131 electricity and the B - particle 130 CONCEPTION OF THE CHEMICAL ELEMENT.
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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