-
1 radium
[English Word] radium[Swahili Word] radi[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] an intensely radioactive brilliant white metallic element that resembles barium chemically, occurs in combination in minute quantities in minerals (as pitchblende or carnotite), emits alpha particles and gamma rays to form radon, and is used chiefly in luminous materials and in the treatment of cancer (identified 1899)[Terminology] chemistry------------------------------------------------------------
См. также в других словарях:
Alpha rays — (Physics & Chem.) Rays of relatively low penetrating power emitted by radium and other radioactive substances, and shown to consist of positively charged {alpha particles} (helium nuclei) having enormous velocities but small masses. They are… … The Collaborative International Dictionary of English
alpha rays — alpha radiation or alpha rays noun (physics) A stream of alpha particles • • • Main Entry: ↑alpha * * * alpha rays or alpha radiation, Physics. a stream of alpha particles: »Alpha radiation consists of…high energy particles [that] have low… … Useful english dictionary
alpha rays — alpha rays. См. альфа излучение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
alpha rays — alfa spinduliuotė statusas T sritis fizika atitikmenys: angl. alpha radiation; alpha rays; alpha particle radiation vok. Alphastrahlen, m; Alpha Strahlung, f; Alphastrahlung, f rus. альфа излучение, n; альфа лучи, m pranc. radiation alpha, f;… … Fizikos terminų žodynas
alpha rays — alfa spinduliai statusas T sritis chemija apibrėžtis Labai siauras alfa dalelių pluoštas. atitikmenys: angl. alpha rays rus. альфа лучи … Chemijos terminų aiškinamasis žodynas
alpha rays — alfa spinduliai statusas T sritis augalininkystė apibrėžtis Alfa dalelių srautas, skleidžiamas radioaktyviųjų medžiagų. atitikmenys: angl. alpha rays rus. альфа лучи … Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas
alpha rays — high speed helium nuclei that have been ejected from radioactive substances. Owing to their high velocity (one tenth that of light) their kinetic energy is so great that a single alpha particle produces a microscopic flash of light when it hits a … Medical dictionary
alpha rays — streams of alpha particles (Physics) … English contemporary dictionary
alpha particle — (Physics & Chem.) a particle emitted at high velocity from certain radioactive substances. It is identical to the helium nucleus, consisting of two protons and two neutrons. Rays of such particles are called {alpha rays}. [Webster 1913 Suppl.… … The Collaborative International Dictionary of English
Alpha particle — A tiny mass of material composed of two protons and two neutrons. Alpha particles do not travel very far from their radioactive source. They cannot pass through a piece of paper, clothes or even the layer of dead cells which normally protects the … Medical dictionary
Alpha-Strahlung — alfa spinduliuotė statusas T sritis fizika atitikmenys: angl. alpha radiation; alpha rays; alpha particle radiation vok. Alphastrahlen, m; Alpha Strahlung, f; Alphastrahlung, f rus. альфа излучение, n; альфа лучи, m pranc. radiation alpha, f;… … Fizikos terminų žodynas