actinium series
11actinium — [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 …
12Actinium — Eigenschaften …
13Isotopes of actinium — Actinium (Ac) has no stable isotopes. A standard atomic mass cannot be given.An isotope of actinium occurring within the radioactive disintegration chain of thorium was known as: * mesothorium II : 228AcNaturally occurring actinium is composed of …
14actinium — [ak tɪnɪəm] noun the chemical element of atomic number 89, a rare radioactive metallic element of the actinide series that occurs as an impurity in uranium ores. (Symbol: Ac) Origin early 20th cent.: from Gk aktis, aktin ray + ium …
15actinium — n. Chem. a radioactive metallic element of the actinide series, occurring naturally in pitchblende. Usage: Symb.: Ac …
16radioactive series — Physics, Chem. a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced. Also called decay series. [1920 25] * * * Any of… …
17uranium-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… …
184n+3 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… …
19uranium-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… …
20uranium-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… …
