ScienceJohn Michels (Journalist) 1946 |
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Стр. 293
... atoms ( atomic species ) in addition to the radioactive species of high atomic mass . V. SEPARATION OF ISOTOPES The separation of the isotopes of uranium of atomic masses 235 and 238 has been one of the most impor- tant problems in the ...
... atoms ( atomic species ) in addition to the radioactive species of high atomic mass . V. SEPARATION OF ISOTOPES The separation of the isotopes of uranium of atomic masses 235 and 238 has been one of the most impor- tant problems in the ...
Стр. 296
... ATOMIC NUCLEI AND THE ABUNDANCE OF THE ELEMENTS In 1913 the writer began a statistical study of the atomic weights then known . The results indicated several relations of interest . The atomic weights ( actually mean values for the ...
... ATOMIC NUCLEI AND THE ABUNDANCE OF THE ELEMENTS In 1913 the writer began a statistical study of the atomic weights then known . The results indicated several relations of interest . The atomic weights ( actually mean values for the ...
Стр. 297
... atomic nuclei for any single odd number of neutrons . The figures attached to the symbols of the elements are the isotopic numbers . · Obituary. ( 4 ) Thus , the theory predicted that elements of even atomic number ( P = even ) should be ...
... atomic nuclei for any single odd number of neutrons . The figures attached to the symbols of the elements are the isotopic numbers . · Obituary. ( 4 ) Thus , the theory predicted that elements of even atomic number ( P = even ) should be ...
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