actinium series
31радиоактивное семейство актиноурана — 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… …
32семейство актиноурана — 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… …
33Isotopes of lead — Lead (Pb) has four stable isotopes 204Pb, 206Pb, 207Pb, 208Pb and one common radiogenic isotope 202Pb with a half life of 53,000 years. The standard atomic mass is 207.2(1) u. It is the heaviest discovered element to have a stable isotope. (The… …
34radon — /ray don/, n. Chem. a chemically inert, radioactive gaseous element produced by the decay of radium: emissions produced by outgassing of rock, brick, etc. are a health hazard. Symbol: Rn; at. no.: 86; at. wt.: 222. [1915 20; RAD(IUM) + ON2] * * * …
35radium — /ray dee euhm/, n. 1. Chem. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; at. wt.: 226; at. no.: 88. 2. a lustrous rayon or silk fabric constructed in plain weave and used in women s apparel,… …
36Rutherford, Ernest, Baron Rutherford of Nelson, of Cambridge — ▪ British physicist Introduction born Aug. 30, 1871, Spring Grove, N.Z. died Oct. 19, 1937, Cambridge, Cambridgeshire, Eng. New Zealand born British physicist considered the greatest experimentalist since Michael Faraday (Faraday, Michael)… …
37radioactinium — “+ noun Etymology: New Latin, from radio + actinium : the radioactive isotope of thorium of mass number 227 formed by disintegration of actinium symbol RdAc or Th227; see actinium series * * * /ray dee oh ak t …
38actinon — /ak teuh non /, n. Chem. a chemically inert, gaseous, short lived isotope of radon that is a member of the actinium series. Symbol: An; at. no.: 86; at. wt.: 219. Also called actinium emanation. [1925 30; < NL; see ACTINIUM, ON2] * * * …
39actinouranium — [ak΄tə nō΄yo͞o rā′nē əm] n. [< ACTINIUM + URANIUM] the uranium isotope of mass number 235: begins the actinium series …
40Astatine — (pronEng|ˈæstətiːn) is a radioactive chemical element with the symbol At and atomic number 85. It is the heaviest of the discovered halogens. Characteristics This highly radioactive element has been confirmed by mass spectrometers to behave… …
