actinium series


actinium series
noun
: a radioactive series beginning with actinouranium, constituting the isotope of uranium of mass number 235, and ending with actinium D, constituting the nonradioactive isotope of lead of mass number 207: actinouranium, at. no. 92 (syn. uranium 235) → uranium Y, at. no. 90 (syn. thorium 231) → protactinium 231, at. no. 91 → actinium 227, at. no. 89 → radioactinium, at. no. 90 (syn. thorium 227) [or actinium K, at. no. 87 (syn. francium 223)] → actinium X, at. no. 88 (syn. radium 223) → actinon, at. no. 86 (syn. radon 219) → actinium A, at. no. 84 (syn. polonium 215) → actinium B, at. no. 82 (syn. lead 211) [or astatine 215, at. no. 85] → actinium C, at. no. 83 (syn. bismuth 211) → actinium C, at. no. 84 (syn. polonium 211) [or actinium C, at. no. 81 (syn. thallium 207)] → actinium D, at. no. 82 (syn. lead 207) — compare actinide series

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Chem.
the radioactive series that starts with uranium 235 and ends with a stable isotope of lead of mass number 207.
[1955-60]

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actinium series,
the series of isotopes produced by radioactive decay of actinium.

Useful english dictionary. 2012.

Look at other dictionaries:

  • actinium series — natural radioactive decay series starting with uranium 235 and ending with lead 207 …   English World dictionary

  • actinium series — aktinio radioaktyvioji šeima statusas T sritis chemija apibrėžtis Radioaktyviųjų skilimų seka nuo U iki patvaraus Pb. atitikmenys: angl. actinium family; actinium radioactive family; actinium radioactive series; actinium series; uranium actinium… …   Chemijos terminų aiškinamasis žodynas

  • actinium series — Chem. the radioactive series that starts with uranium 235 and ends with a stable isotope of lead of mass number 207. [1955 60] * * *       set of unstable heavy nuclei constituting one of the four radioactive series (q.v.). * * * …   Universalium

  • uranium-actinium series — aktinio radioaktyvioji šeima statusas T sritis chemija apibrėžtis Radioaktyviųjų skilimų seka nuo U iki patvaraus Pb. atitikmenys: angl. actinium family; actinium radioactive family; actinium radioactive series; actinium series; uranium actinium… …   Chemijos terminų aiškinamasis žodynas

  • Actinium — (pronEng|ækˈtɪniəm) is a radioactive chemical element with the symbol Ac and atomic number 89, which was discovered in 1899, the earliest discovered of the radioactive elements.CharacteristicsActinium is a silvery, radioactive, metallic element.… …   Wikipedia

  • actinium radioactive series — aktinio radioaktyvioji šeima statusas T sritis chemija apibrėžtis Radioaktyviųjų skilimų seka nuo U iki patvaraus Pb. atitikmenys: angl. actinium family; actinium radioactive family; actinium radioactive series; actinium series; uranium actinium… …   Chemijos terminų aiškinamasis žodynas

  • actinium family — aktinio radioaktyvioji šeima statusas T sritis chemija apibrėžtis Radioaktyviųjų skilimų seka nuo U iki patvaraus Pb. atitikmenys: angl. actinium family; actinium radioactive family; actinium radioactive series; actinium series; uranium actinium… …   Chemijos terminų aiškinamasis žodynas

  • actinium radioactive family — aktinio radioaktyvioji šeima statusas T sritis chemija apibrėžtis Radioaktyviųjų skilimų seka nuo U iki patvaraus Pb. atitikmenys: angl. actinium family; actinium radioactive family; actinium radioactive series; actinium series; uranium actinium… …   Chemijos terminų aiškinamasis žodynas

  • actinium — /ak tin ee euhm/, n. Chem. a radioactive silver white metallic element that glows blue in the dark, resembling the rare earths in chemical behavior and valence. Symbol: Ac; at. no.: 89; at. wt.: 227. [1900 05; ACTIN + IUM] * * * ▪ chemical… …   Universalium

  • actinium — [ak tin′ē əm] n. [ModL < ACTINO + IUM] a white, radioactive, metallic chemical element, the first member of the actinide series, found in pitchblende and other minerals or formed in reactors by the neutron irradiation of radium: symbol, Ac; at …   English World dictionary