| 释义 |
actinon, n. Chem.|ˈæktɪnɒn|
[f. actinium n. + -on2.]
1. An isotope of the radioactive gas radon, of mass number 219, occurring in the actinium decay series. Now Hist.
1920E. Q. Adams in Jrnl. Amer. Chem. Soc. XLII. 2206 The names ‘radium emanation’ , ‘actinium emanation’ and ‘thorium emanation’ have been shortened, respectively, to ‘radon’ , ‘actinon’ and ‘thoron’, names which suggest that the element in question is an inert gas. 1932Proc. R. Soc. A. CXXXVI. 412 The transformation actinon-actinium A is accompanied by weak β-rays and strong γ-rays. 1938R. W. Lawson tr. Hevesy & Paneth's Man. Radioactivity (ed. 2) xvii. 165 The molecular weight of the emanations (radon, thoron, actinon) can be approximately determined by observation of the velocity with which they flow through small orifices. 1959Chambers's Encycl. XI. 484/2 Its [sc. radon's] isotopes thoron and actinon are also radioactive emanations.
2. = actinide n.
1947Q. Rev. Chem. Soc. I. 126 The term ‘lanthanon’ ( Ln ) is proposed to denote any element of the group from lanthanum to lutecium inclusive.., and to bring them into conformity with their new analogues the ‘actinons’. 1962P. J. & B. Durrant Introd. Adv. Inorg. Chem. xxvi. 1130 The actinons are the elements following actinium in the seventh Period of the periodic table. 1984Greenwood & Earnshaw Chem. of Elements (1986) xxxi. 1450 The ‘actinides’ (‘actinons’ or ‘actinoids’) are the fourteen elements from thorium to lawrencium inclusive. |