- actinium decay series
- szereg promieniotwórczy urano-aktynowy
English-Polish dictionary for engineers. 2013.
actinium decay series
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actinium series — natural radioactive decay series starting with uranium 235 and ending with lead 207 … English World dictionary
Decay chain — In nuclear science, the decay chain refers to the radioactive decay of different discrete radioactive decay products as a chained series of transformations. Most radioactive elements do not decay directly to a stable state, but rather undergo a… … Wikipedia
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 — (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 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.… … Useful english dictionary
radioactive 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… … Universalium
radioactive series — noun : a series of elements that are formed by disintegration of a long lived parent (as actinium, thorium, or uranium) through the successive loss of alpha or beta particles sometimes by alternative routes and that are all radioactive except the … Useful english dictionary
Isotopes 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 … Wikipedia
Francium — radon ← francium → radium Cs ↑ Fr ↓ Uue … Wikipedia
radium — /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,… … Universalium
francium — /fran see euhm/, n. Chem. a radioactive element of the alkali metal group. Symbol: Fr; at. no.: 87. [1945 50; after FRANCE where first identified; see IUM] * * * ▪ chemical element heaviest chemical element of Group 1 (Ia) in the periodic table … Universalium
