英语词汇“radiothorium”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

radiothorium n.

Brit.

/ˌreɪdɪə(ʊ)ˈθɔːrɪəm/

U.S.

/ˌreɪdioʊˈθɔriəm/

now chiefly historical an isotope of thorium (thorium-228) which occurs in small amounts in natural thorium and is formed by the beta decay of actinium-228, and which itself decays by alpha emission with a half-life of 1.9 years; (also) a mixture of radioactive isotopes of thorium, actinium, and radium, present as decay products in natural thorium.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > thorium > [noun]

thorium1832

thorinum1836

radiothorium1905

1905 Jrnl. Chem. Soc. 88 ii. 789 The author [sc. Ramsay] hence considers it very probable that the radioactive power of thorium is to be attributed to small quantities of this element, radiothorium.

1921 London, Edinb., & Dublin Philos. Mag. 6th Ser. 41 572 A much weaker source of α rays was obtained by dipping a nickel plate for a few seconds in a more dilute solution of radio~thorium.

1950 Thorpe's Dict. Appl. Chem. (ed. 4) X. 435/1 The term radiothorium is loosely applied to the mixture of isotopes that can be separated from natural thorium and which contain the bulk of its activity. Such radiothorium consists of a mixture of meso-Th i, meso-Th ii, radium, and actinium isotopes, respectively, Th-X, a radium isotope, and their decay products, including true radiothorium or ²²⁸Th.

2001 Hindu (Nexis) 17 May Radiothorium had been characterized as a compound of ‘Th-x and stupidity’. Hahn soon convinced the skeptics in Rutherford's laboratory of the reality of his substance.

单词	radiothorium
释义	> as lemmas radiothorium radiothorium n. Brit. /ˌreɪdɪə(ʊ)ˈθɔːrɪəm/ , U.S. /ˌreɪdioʊˈθɔriəm/ now chiefly historical an isotope of thorium (thorium-228) which occurs in small amounts in natural thorium and is formed by the beta decay of actinium-228, and which itself decays by alpha emission with a half-life of 1.9 years; (also) a mixture of radioactive isotopes of thorium, actinium, and radium, present as decay products in natural thorium. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > thorium > [noun] thorium1832 thorinum1836 radiothorium1905 1905 Jrnl. Chem. Soc. 88 ii. 789 The author [sc. Ramsay] hence considers it very probable that the radioactive power of thorium is to be attributed to small quantities of this element, radiothorium. 1921 London, Edinb., & Dublin Philos. Mag. 6th Ser. 41 572 A much weaker source of α rays was obtained by dipping a nickel plate for a few seconds in a more dilute solution of radio~thorium. 1950 Thorpe's Dict. Appl. Chem. (ed. 4) X. 435/1 The term radiothorium is loosely applied to the mixture of isotopes that can be separated from natural thorium and which contain the bulk of its activity. Such radiothorium consists of a mixture of meso-Th i, meso-Th ii, radium, and actinium isotopes, respectively, Th-X, a radium isotope, and their decay products, including true radiothorium or ²²⁸Th. 2001 Hindu (Nexis) 17 May Radiothorium had been characterized as a compound of ‘Th-x and stupidity’. Hahn soon convinced the skeptics in Rutherford's laboratory of the reality of his substance. extracted from radio-comb. form² < as lemmas
随便看	disappointingly disappointingness disappointment disappointments disappoints disappreciate disappreciation disapprobation disapprobations discumbing discumbitory discumbiture discumbrance discur discured discurrent discursation discursative discursativeness discurse discurse of reason discursion discursion of the etc discursion of the judgement discursion of the mind

> as lemmas