Science and Life: Aberdeen AddressesJ. Murray, 1920 - 229 páginas |
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Página 98
... particles , are electrons - the atoms of negative electricity divorced from matter , recog- nised as such by Sir J. J. Thomson in 1897 , but previously well - known in the phenomena of the Crookes ' tube . They travel at a speed varying ...
... particles , are electrons - the atoms of negative electricity divorced from matter , recog- nised as such by Sir J. J. Thomson in 1897 , but previously well - known in the phenomena of the Crookes ' tube . They travel at a speed varying ...
Página 100
... a second or less . The atom of uranium expels 7 a- and 5 B - particles , in twelve successive changes , one particle per atom at each change . The atom of thorium expels 6 a- and 3 B - particles . The B - particles are atoms of electricity ...
... a second or less . The atom of uranium expels 7 a- and 5 B - particles , in twelve successive changes , one particle per atom at each change . The atom of thorium expels 6 a- and 3 B - particles . The B - particles are atoms of electricity ...
Página 101
... the expulsion of an a - particle ought to lower the atomic weight of the element expelling it by 4 units , 4 being the atomic weight of helium . In its transformation into radium , uranium P expels 3 a - particles . The atomic weight of.
... the expulsion of an a - particle ought to lower the atomic weight of the element expelling it by 4 units , 4 being the atomic weight of helium . In its transformation into radium , uranium P expels 3 a - particles . The atomic weight of.
Página 102
Aberdeen Addresses Frederick Soddy. expels 3 a - particles . The atomic weight of uranium is 238 , and that found by ... particle , or the B - particle , from an atom leaves a new atom with properties different from the parent , but ...
Aberdeen Addresses Frederick Soddy. expels 3 a - particles . The atomic weight of uranium is 238 , and that found by ... particle , or the B - particle , from an atom leaves a new atom with properties different from the parent , but ...
Página 103
... of the nature of matter than even the surprising discoveries of the genesis of one element out of another . The present theory of atomic structure is due to Rutherford , and is based on experiments on the course followed by an a - particle ...
... of the nature of matter than even the surprising discoveries of the genesis of one element out of another . The present theory of atomic structure is due to Rutherford , and is based on experiments on the course followed by an a - particle ...
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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