| 释义 |
isotopy|aɪˈsɒtəpɪ|
[f. isotopic a. + -y3.]
The fact or condition of being isotopic.
1914Phil. Mag. XXVIII. 839 The stability of RaG and its isotopy with lead. 1919F. Soddy in Jrnl. Chem. Soc. CXV. 18 Its [sc. actinium's] definite location in the periodic table, by virtue of its isotopy with mesothorium-2. 1925J. Joly Surface-Hist. Earth ix. 150 Isotopy is not peculiar to the uranium and thorium groups of elements. 1926R. W. Lawson tr. Hevesy & Paneth's Man. Radioactivity xvi. 125 (heading) Isotopy and the displacement laws in the light of atomic constitution. 1966McGraw-Hill Encycl. Sci. & Technol. VII. 291/2 The occurrence and degree of isotopy among the 83 elements that are found in nature in significant amounts have been ascertained by means of mass spectrometer studies.
Also ˈisotopism (in the same sense).
1914F. Soddy Chem. Radio-Elements ii. 17 The new data are the isotopism of mesothorium ii and actinium, and of radio-actinium and thorium. 1938Chem. Abstr. XXXII. 8925 Evidence is offered that the discovery of the existence of isotopism in nonradioactive elements is another confirmation of O.'s nuclear law of 4. |