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1 plutonium
[English Word] plutonium[Swahili Word] plutoni[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a radioactive metallic element similar chemically to uranium that is formed as the isotope 239 by decay of neptunium and found in minute quantities in pitchblende, that undergoes slow disintegration with the emission of an alpha particle to form uranium 235, and that is fissionable with slow neutrons to yield atomic energy (identified 1942)[Terminology] chemistry------------------------------------------------------------ -
2 polonium
[English Word] polonium[Swahili Word] poloni[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a radioactive metallic element that is similar chemically to tellurium and bismuth, occurs especially in pitchblende and radium-lead residues, and emits an alpha particle to form an isotope of lead (identified 1898)[Terminology] chemistry------------------------------------------------------------
См. также в других словарях:
radioactive particle — radioaktyvioji dalelė statusas T sritis fizika atitikmenys: angl. radioactive particle vok. radioaktive Partikel, f; radioaktives Teilchen, n rus. радиоактивная частица, f pranc. particule radioactive, f … Fizikos terminų žodynas
radioactive particle — radioaktyvioji dalelė statusas T sritis apsauga nuo naikinimo priemonių apibrėžtis Dalelė, kuri gali jonizuoti aplinką; radioaktyvioji dalelė gali būti: ↑ alfa dalelė, ↑ beta dalelė, ↑ neutronas, ↑ protonas ir kt. atitikmenys: angl. radioactive… … Apsaugos nuo naikinimo priemonių enciklopedinis žodynas
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particle accelerator — accelerator (def. 7). [1945 50] * * * Device that accelerates a beam of fast moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic… … Universalium
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
Particle, alpha — 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
